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Corneal Mapping
Corneal topography, which is also called photokeratoscopy or videokeratography, is a non-invasive way to map the surface curve of the cornea, which is the outermost part of the eye. Since the cornea is usually responsible for about 70% of the eye’s refractive power, its shape is a key factor in how well you can see.
So, the three-dimensional map is a helpful tool for the ophthalmologist or optometrist who is doing the exam. It can help them diagnose and treat a number of eye problems, plan refractive surgery like LASIK and evaluate its results, or check how well contact lenses fit. As an improvement on keratoscopy, corneal topography increases the number of points that can be measured from four points a few millimetres apart to a grid of thousands of points that cover the whole cornea. The process takes only a few seconds and doesn’t hurt at all.
Thank you very much to the EyeGlass Guide for providing information that helped make this page.
Visual Field Testing
A visual field test measures the range of your “side” or “peripheral” vision to see if you have any dark spots (called “scotomas”), loss of peripheral vision, or problems with your visual field. It is a simple, painless test that does not involve eye drops but does test the patient’s ability to understand and follow directions.
The optometrist can do a first visual field screening by having you keep your eyes on a central object while covering one eye and asking you to explain what you see at the edges of your field of vision. For a more thorough evaluation, your vision field might be tested with special tools. One of these tests is to put your chin on a chin rest and look straight ahead. Lights flash on and off, and whenever you see a light, you have to press a button. At different points in the test, the lights are bright or dim. Some of the flashes are just to make sure you’re paying attention. Each eye is checked on its own, and the whole process takes between 15 and 45 minutes. These tools can use a computer to make a map of your visual field that shows if and where you have any problems.
OPTOS Retinal Exam
Getting your eyes checked once a year is important for your vision and general health. As an important part of our eye tests, we offer the optomap® Retinal Exam. The optomap® Retinal Exam gives us a picture of your retina that is as unique as your fingerprint and gives us a wide view of its health. The retina is the part of your eye that takes pictures of what you are looking at, just like the film in a camera.
There are many eye problems that can happen without you noticing. You might not even notice that your eyesight has changed. But a complete exam of the retina can show diseases like macular degeneration, glaucoma, retinal tears or detachments, and other health problems like diabetes and high blood pressure.
An optomap® Retinal Exam provides:
- A scan to show a healthy eye or detect disease.
- A view of the retina, giving your doctor a more detailed view than he/she can get by other means.
- The opportunity for you to view and discuss the optomap® image of your eye with your doctor at the time of your exam.
- A permanent record for your file, which allows us to view your images each year to look for changes.
The optomap® Retinal Exam is fast, easy, and comfortable for all ages. To have the exam, you simply look into the device one eye at a time and you will see a comfortable flash of light to let you know the image of your retina has been taken. The optomap® image is shown immediately on a computer screen so we can review it with you.