Last Updated on March 19, 2026 by admin
Protect Your Furry Buddy’s Vision: A Simple Guide to DIY Dog Eye Exams at Home
Dogs, our cherished furry friends, deserve the best care, including maintaining their vision health. With a few simple at-home tests, you can help monitor your dog’s eyesight and detect any potential vision issues early on. These DIY eye exams empower you to play a proactive role in your dog’s well-being, ensuring they continue to navigate the world with clarity and joy.
To assess your dog’s vision at home:
-Monitor reaction time and object tracking.
-Observe behavior in different lighting conditions.
-Test sound localization skills.
-Check for eye abnormalities.
-Seek veterinary assistance if vision problems are suspected.
Key Takeaways:
Monitor Behavior: Observe daily activities for signs of vision issues, like bumping into objects, hesitant movement, or behavior changes.
DIY Vision Assessment: Conduct simple vision assessments at home using moving objects, treats, and sound to gauge response time, tracking ability, and sound localization.
Eye Examination: Inspect your dog’s eyes for redness, cloudiness, or abnormal discharge, which may indicate vision problems.
Vary Lighting Conditions: Observe your dog’s behavior in different lighting conditions to detect signs of vision impairment.
Consult a Vet: If you suspect vision issues, seek professional assistance from a veterinarian for a comprehensive eye exam and accurate diagnosis.
Seek Veterinary Attention
How Can I Test My Dog’s Vision at Home?
If you’ve ever wondered if your dog’s vision is deteriorating, there are several effective ways to test their eyesight at home. By paying attention to their behavior, conducting vision assessments, and inspecting their eyes, you can gain valuable insights into your dog’s visual capabilities.
Observe Behavior Changes
One of the most evident signs of vision problems in dogs is a change in behavior. Bumping into objects, hesitating to walk down stairs, or showing reluctance to enter unfamiliar spaces could indicate vision issues. Monitor your dog’s behavior closely, especially in different lighting conditions, to detect any abnormalities.
Conduct Vision Assessments
Testing your dog’s vision at home can be both fun and informative. Use enticing objects or snacks to assess their reaction time and tracking ability. Toss a ball or treat to the side and observe how quickly and accurately they react. Additionally, test their sound localization by making noises from various directions and see how they respond.
Inspect Eyes
Regular eye inspections can also reveal potential vision problems. Look for signs of redness, cloudiness, or unusual discharge, as these could indicate an underlying eye condition. Gently pull back your dog’s eyelid and inspect the cornea, iris, and lens for any abnormalities. If you notice anything out of the ordinary, consult a veterinarian immediately.
When to Seek Veterinary Attention
If you suspect that your dog’s vision is impaired, it’s crucial to seek veterinary attention. A veterinarian will conduct a thorough eye examination, including a vision test, to determine the extent and cause of the problem. Early diagnosis and treatment can preserve your dog’s vision and prevent further complications.
Remember, regular eye check-ups with your veterinarian are essential for maintaining your dog’s overall health and well-being. By staying vigilant and conducting simple vision tests at home, you can help ensure that your furry friend’s vision remains sharp and clear throughout their life.
Watch Gaze Fixation and Eye Movements
The well-being of our canine companions hinges on their ability to navigate the world around them, and vision plays a pivotal role in this endeavor. As responsible pet owners, it’s essential to be vigilant in monitoring our dogs’ visual acuity to ensure their safety and overall quality of life. Fortunately, there are several methods to test your dog’s vision at home, enabling you to detect any potential impairments early on.
One simple test is to assess their watch gaze fixation and eye movements. Dogs, like humans, possess a natural tendency to fixate their gaze on objects of interest. When presented with a moving object, healthy dogs will typically track its movement smoothly and steadily. However, if your dog’s eyes appear to have difficulty following the object or exhibit jerking or erratic movements, it could be an indication of vision problems.
Another crucial aspect to observe is the symmetry of your dog’s eyes. Healthy dogs typically have eyes that move in unison, exhibiting smooth and coordinated movements. If you notice any asymmetry or misalignment in their eye movements, such as one eye lagging behind the other or appearing to drift, it warrants further investigation by a veterinarian.
Furthermore, pay attention to your dog’s behavior and interactions with their environment. Bumping into objects, hesitancy in navigating familiar spaces, or changes in their activity levels could be signs of impaired vision. Additionally, observe their behavior in different lighting conditions. Dogs with vision problems may exhibit difficulty seeing in dim light or may become overly sensitive to bright light.
Another simple test involves using a flashlight. Shine the light into each of your dog’s eyes, observing the pupillary response. Healthy dogs’ pupils should constrict (get smaller) in response to light. If you notice any abnormalities in the pupillary response, such as delayed constriction or lack of reaction to light, it’s important to consult a veterinarian promptly.
Regular eye examinations by a veterinarian are also highly recommended, especially for senior dogs or those with pre-existing health conditions. These examinations can help detect subtle changes in your dog’s vision that you might miss during home testing. Early detection and intervention can significantly improve the outcome of any underlying eye conditions.
By being proactive and performing regular vision tests at home, you can play a crucial role in safeguarding your dog’s eyesight and ensuring their continued ability to navigate the world with confidence and joy.
Observe Pupil and Iris Reflexes and Abnormalities
How Can I Test My Dog’s Vision at Home: Expert Insights for Dog Owners
As a devoted dog owner, your furry companion’s well-being is your top priority. Often, vision problems in dogs can manifest subtly, making it crucial to conduct regular vision tests at home. Here’s a comprehensive guide to help you assess your dog’s eyesight and detect potential issues early on.
- Observe Behavior Changes: Trust Your Instincts
Stay alert to any behavioral changes in your dog. Hesitant movement, an apparent lack of coordination, and frequent instances of unexpectedly banging into objects may all point towards vision impairment.
- Redness, Cloudiness, and Discharge: Visual Clues to Eye Issues
Conduct a thorough visual inspection of your dog’s eyes. Redness, cloudiness, or any abnormal discharge should raise red flags, as these often indicate eye infections or underlying medical conditions.
- Bright Light Test: Revealing Pupillary Responses
The pupillary reflex is a crucial indicator of eye health. In a well-lit room, use a small flashlight to observe your dog’s eyes. Shine the light briefly from a short distance away and watch how the pupils respond. If they constrict normally, your dog’s vision is likely normal.
- Lighting Conditions: Adapting to Different Environments
With dogs, vision clarity can vary in different lighting conditions. If your dog appears confused or disoriented in dim light, it could be a sign of reduced night vision.
- Outdoor Obstacle Course: Navigating Obstacles with Ease
Set up a simple obstacle course in your backyard using everyday items. Position cones for your dog to weave in and out of and challenge them to walk over low hurdles. Their ability to navigate the course smoothly indicates good vision.
- Follow the Toy: Tracking Movement and Orientation
Play a game of fetch with your dog. As you throw a ball or a toy, keep an eye on how closely they track its trajectory. Successful retrieves suggest good vision, while difficulty in tracking the toy’s movement may signal vision problems.
- Seek Expert Evaluation: When in Doubt, Consult Your Vet
Despite your best efforts, DIY vision tests at home can only provide a general idea of your dog’s eyesight. If you notice any changes in behavior or unusual signs during these tests, do not hesitate to schedule an appointment with your trusted veterinarian for a comprehensive eye examination.
How Do You Inspect a Dog’s Eye?
How Can I Test My Dog’s Vision at Home?
Regularly inspecting your dog’s eyes is crucial for ensuring their overall health and well-being. Early detection of any vision problems can lead to timely treatment and management, preventing further complications. Here are a few simple methods you can use to test your dog’s vision at home:
Behavioral Observations: Keep an eye on your dog’s behavior for any signs that may indicate vision problems. Hesitant movement, bumping into objects, or difficulty navigating familiar spaces could be red flags.
Eye Examination: Gently pull your dog’s eyelid outward and inspect the cornea, iris, and pupil. Look for any signs of redness, cloudiness, or unusual discharge. The eyes should be clear, bright, and free from any abnormalities.
Light Response Test: In a dimly lit room, shine a flashlight into each of your dog’s eyes. Observe how the pupils respond. Healthy eyes should constrict (get smaller) in response to light. If one or both pupils remain dilated (enlarged), it could indicate vision problems.
Following Movement: Hold a small toy or treat in front of your dog’s face and slowly move it side to side. A dog with normal vision should be able to track the movement smoothly and accurately. Difficulty following the object could be a sign of vision impairment.
Obstacle Course: Create a simple obstacle course using household items such as chairs, boxes, and pillows. Encourage your dog to navigate through the course. If they hesitate, bump into objects, or struggle to find their way, it could indicate vision problems.
Remember, these home tests are not a substitute for professional veterinary care. If you suspect that your dog may have vision problems, it’s important to schedule an appointment with your veterinarian for a comprehensive eye examination and diagnosis. Early detection and management can help preserve your dog’s vision and overall quality of life.
Ensure Adequate Lighting
How Can I Test My Dog’s Vision at Home?
Ensuring your dog’s vision is healthy is crucial for their overall well-being. While it’s best to schedule regular checkups with your veterinarian, there are some simple tests you can perform at home to assess your dog’s vision.
1. Ensure Adequate Lighting:
- Conduct the tests in a well-lit area to ensure accurate results. Make sure the room is brightly lit but not causing glare that could potentially harm your dog’s eyes.
2. Observe Your Dog’s Behavior:
- Monitor your dog’s behavior for signs of vision problems, such as hesitant movement, bumping into objects, difficulty catching treats, or misjudging distances.
3. Check for Eye Abnormalities:
- Inspect your dog’s eyes for any abnormalities, including redness, cloudiness, discharge, or crust in the corners of the eyes.
4. Test Responsiveness to Light:
- Gently wave a bright object, such as a flashlight or a toy, in front of your dog’s eyes, both individually and together. A healthy dog will blink, follow the object with their eyes, or show interest in it.
5. Vision Test with Treats:
- Toss treats or toys in different directions while observing your dog’s ability to locate them. A healthy dog should be able to find the treats or toys without difficulty.
6. Test Vision in Different Lighting Conditions:
- Observe your dog’s behavior in different lighting conditions, such as bright sunlight, dim light, or darkness. Note any changes in their behavior or difficulty seeing objects.
7. Compare Pupil Sizes:
- Check if your dog’s pupils are equal in size and shape. Unequal pupils can indicate vision problems.
8. Watch for Squinting or Pawing at Eyes:
- Pay attention to your dog’s eyes for signs of squinting or pawing at them. These behaviors could indicate eye discomfort or vision problems.
Regular Veterinary Checkups:
- While these tests can provide insights into your dog’s vision, it’s crucial to schedule regular veterinary checkups for comprehensive eye exams. Your veterinarian can use specialized equipment to evaluate your dog’s vision accurately and detect any underlying conditions.
Check Pet’s Ability to Catch Treats
How Can I Test My Dog’s Vision at Home?
Monitoring your dog’s vision is vital to maintaining their overall health and well-being. Here’s a step-by-step guide to help you assess your dog’s vision at home:
Create a Testing Environment:
Choose a well-lit area where you can clearly observe your dog’s eyes.
Remove any obstacles or hazards to ensure a safe testing environment.
Utilize Visual Stimuli:
Use a variety of objects, such as a ball, toy, or treat, that may capture your dog’s attention.
Start by placing the object at a close distance to your dog and gradually move it farther away.
Observe your dog’s reaction to these visual stimuli.
Assess Responsiveness:
Call your dog’s name and see if they respond by looking at you or moving towards you.
Clap your hands or make other sounds to check their auditory response.
Note any hesitation or lack of response, as this may indicate vision problems.
Test Peripheral Vision:
Slowly move a treat or toy from one side of your dog’s field of vision to the other.
Observe if your dog’s eyes follow the moving object smoothly, or if they struggle to track it.
Check for Visual Oddities:
Inspect your dog’s eyes for signs of cloudiness, redness, or discharge.
Look for any physical abnormalities like a cataract or squinting, which may indicate vision issues.
Monitor Behavior:
Observe your dog’s behavior in different lighting conditions to check for difficulty seeing.
Keep an eye out for unusual behaviors such as bumping into objects, hesitance to move, or difficulty navigating familiar spaces.
Any significant changes in behavior could indicate vision problems.
Remember, these home tests can provide general insight into your dog’s vision, but a visit to the veterinarian for a comprehensive eye exam is essential for an accurate diagnosis and appropriate treatment. If you suspect any vision problems, schedule an appointment with your veterinarian promptly to ensure your dog’s vision is addressed promptly.
Use a Flickering Light Source
How Can I Test My Dog’s Vision at Home? Use a Flickering Light Source
Testing your dog’s vision at home can help you detect any potential vision problems early on. One simple way to do this is by using a flickering light source, such as a flashlight or a candle flame.
Hold the light source in front of your dog’s eyes, about a foot away. Move it back and forth, up and down, and from side to side. A dog with normal vision will be able to focus on the flickering light and track its movement. If your dog struggles to focus on the light, has trouble tracking its movement, or shows no interest in it, it may have vision problems.
Keep in mind that some dogs may be overwhelmed by flickering lights, so keep the test brief to avoid causing unnecessary stress. If you suspect your dog has vision problems, schedule an appointment with your veterinarian for a comprehensive eye exam.
Here are some additional tips for testing your dog’s vision at home:
Be Patient: Testing your dog’s vision requires patience and cooperation from your dog.
Use a Familiar Area: Conduct the test in a familiar area where your dog feels comfortable and relaxed.
Choose the Right Time: Pick a time when your dog is alert and engaged.
Observe Your Dog’s Behavior: Pay attention to your dog’s behavior during the test.
Look for Behavioral Changes: Be on the lookout for behavioral changes that may indicate vision problems.
Good Lighting: Ensure the area is well-lit to provide clear visibility.
If you notice any signs of vision problems, such as difficulty focusing on objects, bumping into furniture, or avoiding stairs, it’s important to schedule an appointment with your veterinarian right away. Early detection and treatment can help preserve your dog’s eyesight and overall well-being.
How Can I Test My Dog’s Eyesight at Home?
How Can I Test My Dog’s Vision at Home?
As a pet parent, you want to ensure your dog’s overall well-being, including its eyesight. While it’s best to schedule regular checkups with your veterinarian for comprehensive eye exams, there are a few methods you can use to test your dog’s vision at home.
1. Observe Your Dog’s Behavior:
Keep an eye out for any behavioral changes that may indicate vision problems. Hesitation when moving, frequent bumping into objects, or difficulty catching things could be signs of impaired vision.
2. Check for Physical Signs:
Inspect your dog’s eyes for any physical signs of eye problems. Redness, cloudiness, discharge, or excessive squinting can all point to potential vision issues.
3. Conduct a Menace Reflex Test:
Hold your hand open and move it quickly towards your dog’s face. If your dog blinks, it indicates that it can see the movement and is reacting to the potential threat.
4. Observe Behavior in Different Lighting Conditions:
Take your dog to a well-lit area and observe its behavior. Then, gradually move to dimmer areas to see if there are any noticeable changes in its behavior. Difficulty navigating or hesitation in dimly lit environments could indicate vision problems.
5. Use a Flashing Light Source:
Hold a flashlight or a candle flame a few feet away from your dog’s face. Observe its reaction to the flickering light. If it follows the light with its eyes, it likely has good vision.
These at-home tests can provide you with some insights into your dog’s vision, but they’re not a substitute for professional eye exams. Regular vet checkups are crucial for detecting and addressing any underlying eye issues early on, ensuring your dog’s long-term eye health.
Monitor Changes in Pet’s Behavior
How Can I Test My Dog’s Vision at Home?
Dogs are unable to communicate their vision problems, making it essential for dog owners to take an active role in testing their dog’s vision at home. Regular monitoring of your dog’s behavior and physical appearance can help you spot signs of vision impairment early on.
Behavioral Changes:
Watch for behavioral changes that may indicate vision problems. These include:
Hesitation when moving
Frequent bumping into objects
Difficulty catching things
Increased clumsiness
Misjudging jumps
Physical Signs:
Check for physical signs of eye problems, such as:
Redness
Cloudiness
Discharge
Bulging eyeballs
Eye Exams:
Conduct eye exams in well-lit areas to observe your dog’s reactions to light. Check for any signs of infection, debris, or disease in your dog’s eyes. Look for redness or irritation in the lining of your dog’s eyes.
Menace Reflex Test:
Test your dog’s menace reflex by moving your hand quickly towards its face to see if it blinks. A normal response is for the dog to blink or move its head away.
Common Eye Ailments:
Understand the symptoms of common eye ailments in dogs, such as bloodshot eyes, cloudiness, and bulging eyeballs. These may indicate serious vision problems and require veterinary attention.
Regular Checkups:
Regular veterinary checkups can help detect and treat eye issues early. Older dogs and certain breeds may be more prone to vision problems, so regular checkups are essential for these dogs.
By following these steps, you can help test your dog’s vision at home and detect any vision problems early on. Early detection and treatment can help preserve your dog’s vision and overall health.
How Do Vets Test Dogs Eyesight?
How Can I Test My Dog’s Vision at Home?
As a pet owner, monitoring your dog’s health is crucial, including their eyesight. While regular veterinary checkups are essential, there are some simple tests you can perform at home to assess your dog’s vision. Here are a few methods to help you determine if your furry friend may have vision problems:
1. Observe Your Dog’s Behavior:
Keep an eye out for any behavioral changes that might indicate vision problems. Hesitation, frequent bumping into objects, or difficulty catching things could be signs of impaired vision.
2. Check for Physical Signs:
Inspect your dog’s eyes for any physical signs of problems. Look for redness, cloudiness, or discharge, which could indicate an infection, debris, or disease.
3. Conduct the Menace Response Test:
The menace response test assesses your dog’s ability to visually react to a threatening stimulus. Hold your hand or an object a few inches from your dog’s face and quickly move it towards their eyes. A normal response would be for your dog to blink or turn their head away.
4. Perform the Cotton Ball Test:
The cotton ball test is a simple way to check your dog’s peripheral vision. Hold a cotton ball on the side of your dog’s head and move it slowly towards their face. If your dog follows the cotton ball with their eyes, their peripheral vision is likely normal.
5. Dazzle Reflex Test:
The dazzle reflex test assesses your dog’s response to bright light. Shine a flashlight in your dog’s eyes and observe their reaction. Normally, your dog’s pupils should constrict in response to the light.
6. Create an Obstacle Course:
Set up a simple obstacle course using household items like chairs, boxes, or cones. Observe your dog as they navigate the course. If they seem to have difficulty seeing the obstacles or bump into them, it could indicate vision problems.
7. Monitor Your Dog’s Eyes in Different Lighting Conditions:
Take note of how your dog’s vision appears in different lighting conditions. Do they seem to have difficulty seeing in dim light or bright sunlight? Changes in vision based on lighting conditions could indicate potential problems.
Test With Motion, Not Stationary Objects
How Can I Test My Dog’s Vision at Home?
Monitoring your dog’s vision at home is essential for early detection of potential vision problems. Here are simple yet effective ways to test your dog’s eyesight at home:
Test with Motion, Not Stationary Objects:
Contrary to popular belief, dogs don’t fare well with stationary items like fingers or cotton balls. Instead, opt for moving objects that attract their attention better.
1. Engage with Colorful, Moving Objects:
Entice your dog with vibrant toys or alluring items. Move them in diverse directions and at varying speeds, imitating prey movement, to assess their tracking abilities.
2. Fetch and Retrieve:
Toss a ball or favorite toy for your dog to fetch. Observe closely how efficiently they locate and bring back the object.
3. Hide-and-Seek:
Conceal treats or toys in various spots around your home. Let your dog sniff and search for these hidden treasures using both smell and vision.
4. Obstacle Course:
Create a simple obstacle course with chairs, tables, or cones. Observe how your dog navigates these challenges, noting any hesitation or clumsiness due to impaired vision.
5. Observe Behavioral Changes:
Look out for changes in your dog’s everyday behavior, such as hesitancy in exploring new environments, bumping into furniture or walls, or difficulty navigating stairs.
Signs of Vision Problems:
If you notice any of these signs, it’s crucial to consult your veterinarian promptly for a thorough eye examination:
Bumping into furniture or walls
Difficulty navigating obstacles or stairs
Refusal to go outdoors or play fetch
Excessive squinting, tearing, or discharge from the eyes
Redness or cloudiness of the eyes
Uneven or dilated pupils
Behavioral changes like anxiety, pacing, or disorientation
How Can I Tell if My Dog Has Bad Eyesight?
How Can I Test My Dog’s Vision at Home?
Does your canine companion seem to be bumping into furniture or having difficulty navigating familiar spaces? These could be signs of vision problems. Regular eye checkups with a veterinarian are crucial, but you can also perform simple tests at home to assess your dog’s vision. Here’s how:
Obstacle Course: Create a simple obstacle course using household items like chairs, boxes, and cones. Observe your dog as they navigate through the course. Hesitation, bumping into objects, or difficulty maneuvering may indicate vision problems.
Menace Response Test: Hold a dog toy or treat near your dog’s eyes. Move it quickly towards their face. A normal blink reflex indicates normal vision. Lack of response or delayed blinking could be a sign of vision impairment.
Light Reflex Test: In a dimly lit room, hold a flashlight near your dog’s eye. Shine the light directly into the pupil. Normally, the pupil should constrict. If the pupil remains dilated, it could indicate vision issues.
Dazzle Reflex Test: Shine a bright light directly into your dog’s eyes. Observe their reaction. Normally, dogs should blink rapidly and turn their head away from the light. Lack of response or blinking could indicate vision problems.
Cotton Ball Test: Drop a cotton ball near your dog’s face. Observe their reaction. Normally, dogs should react by blinking or moving their head away. Lack of reaction may indicate vision impairment.
Behavioral and Physical Signs: Look for behavioral or physical signs of vision issues, such as hesitation when walking or going up or down stairs, bumping into objects, redness or discharge from the eyes, and difficulty catching treats or toys.
Advanced Diagnostic Techniques: If you suspect vision problems, consult your veterinarian. They may recommend advanced diagnostic techniques like electroretinography, fundus photography, or optical coherence tomography to assess your dog’s vision accurately.
Regular eye checkups and home tests can help you detect vision problems early. Prompt intervention and treatment can improve your dog’s quality of life and prevent further vision loss.
Set Up Clear and Varied Observations Areas
How Can I Test My Dog’s Vision at Home?
Monitoring your dog’s eyesight is crucial for their overall well-being. Regularly testing your dog’s vision at home can help you detect any potential problems early on. Here are a few simple methods to assess your dog’s vision:
Obstacle Course: Set up an obstacle course in your yard to test your dog’s ability to navigate obstacles using their eyesight. Place objects like cones, boxes, and chairs at different heights and distances. Observe how your dog navigates through the course, paying attention to any hesitation or bumping into objects.
Menace Response Test: This simple test assesses your dog’s ability to respond to a visual threat. In a well-lit room, find a dog toy that will capture their attention. Quickly swing the toy toward your dog’s eyes. A normal response is for your dog to blink or move their head away.
Light Reflex Test: Also known as the pupillary light reflex (PLR) test, this test checks your dog’s reaction to light. Hold a flashlight two to three inches away from your dog’s eye and watch if the pupils contract or narrow. A normal response is for the pupils to constrict when light is shone into the eyes.
Dazzle Reflex Test: This test combines the menace response and the PLR test. By shining a bright light directly into the dog’s eyes, you can make them blink. Normal dogs will blink in response to sudden bright light.
Cotton Ball Test: The cotton ball test provides insight into the reactiveness of your dog’s eyesight. Drop a cotton ball at least half a foot away from your dog’s face and observe their reaction, particularly how their eyes move to find the cotton ball. A normal response is for your dog to quickly spot and follow the movement of the cotton ball.
Regularly testing your dog’s vision at home can help you detect any vision problems early, allowing you to seek prompt veterinary care if necessary. Always consult with your veterinarian if you notice any changes in your dog’s vision or behavior that may indicate vision issues.
Check for Eye Health Issues
How Can I Test My Dog’s Vision at Home?
Maintaining your dog’s eye health is crucial for their overall well-being. Regular eye checkups can help detect potential vision problems early on, enabling prompt treatment. While veterinary eye exams are essential, you can also conduct simple tests at home to assess your dog’s vision.
Obstacle Course Test:
Set up a maze-like obstacle course using household items. Observe your dog as they navigate the course. Difficulty in navigating may indicate vision problems.
Menace Response Test:
Quickly move a toy or hand towards your dog’s eyes. If they blink, their vision is likely functional. If they don’t, consider further evaluation.
Light Reflex Test:
Shine a flashlight into your dog’s eyes in a darkened room. Observe their pupils. If they contract, their vision is probably normal. Dilated or non-reactive pupils warrant further examination.
Cotton Ball Test:
Drop a cotton ball in front of your dog’s face. A healthy response involves reacting to the cotton ball’s movement. Lack of reaction may suggest vision issues.
If your dog fails several of these tests, consult your veterinarian for a comprehensive eye exam. Early detection and intervention can help preserve your dog’s vision and overall health.