Pretesting for Thorough Eye Care
Computerized Screening for Glaucoma, Cataracts, Macular Degeneration & More
The first step, before we even jump into your eye exam, is what’s called a pretest. It gives us a better idea of what to look for during the exam so we can get that done as thoroughly as possible without spending your time looking for eye issues that aren’t there. It also can give us an idea of what we need to look at more carefully.
Computerized Refraction and Topography
Lifetime Vision uses a non-invasive medical imaging technique for mapping the surface curvature of your eye. Since the cornea, the outer structure of the eye, is normally responsible for some 70 percent of the eye’s refractive power, its topography is critical in determining the quality of vision.
Corneal topography creates a three-dimensional map, which is a valuable aid to our doctors. It can assist in the diagnosis and treatment of several conditions; planning refractive surgery, such as LASIK; assessing dry eye; and ensuring the fit of contact lenses. The procedure, which is carried out in seconds and is completely painless, is a standard part of our contact lens fittings.
Automated Visual Field
Visual field refers to the entire area that can be seen when the eye is directed forward, including what is seen peripherally. Many diseases can adversely affect the visual field – glaucoma, stroke, high blood pressure, diabetes, multiple sclerosis and over activity of the thyroid gland.
We also can test the visual field to measure the extent and distribution of the field of vision. During this test, our technicians use computerized instruments to map out your visual field. An Automated Visual Field Test is also referred to as “Perimetry.”
Glaucoma Testing with Cirrus HD-OCT
At Lifetime Vision can you be tested for glaucoma and retinal disease with the Cirrus HD-OCT, a gold standard in-vivo imaging device that offers advanced pre- and post-therapy assessments of retinal disease. With it, our doctors get real-time images for analyzing retinal features to optimize your diagnosis and monitor retinal disease. This device also is ideal for evaluating cataract patients pre- and post-operatively, and for assessing the early signs of glaucoma and glaucomatous change.
Color vision testing
People with a color vision deficiency see colors but have a hard time differentiating between specific colors – brown and green are a good example. A color vision deficiency is often a major concern for parents of young children.
This test can determine the following color vision problems:
- Achromatopsia — complete color blindness, seeing only shades of gray
- Deuteranopia — difficulty telling the difference between red/purple and green/purple
- Protanopia — difficulty telling the difference between blue/green and red/green
- Tritanopia — difficulty telling the difference between yellow/green and blue/green
When it comes to seeing the world in three dimensions, depth perception plays a crucial role. Without it, there’s no way we can recognize distances between people and/or objects in all directions. By definition, depth is looking into a hole or tube and estimating forward distances. To do this accurately, one must have binocular stereoscopic vision, or stereopsis. If someone lacks stereopsis, perceiving depth may be more difficult and less accurate, and they must rely on other visual cues.
Vision therapy is the preferred way to treat depth perception issues. Vision therapists can train a person’s brain to fuse the image from each eye, or in the worst-case scenario, to ignore the image from the malfunctioning eye. Our doctors also can prescribe contact lenses or eyeglass lenses to hinder and block out unclear images of the malfunctioning eye, so they don’t interfere with the images from the properly functioning eye.
Digital Retinal Imaging with Optomap®
The optomap retinal exam is breakthrough technology that images the back of your eye so our doctors can assess overall eye health and detect signs of other diseases such as cancer, diabetes and hypertension.
The optomap technology is a patient-friendly, quick and comfortable procedure which captures and analyzes an image of virtually the entire retina in a quarter of a second. It takes only minutes to perform, and you’ll be able to view your optomap image with your eye doctor during the exam. It also provides our physicians with a permanent record for annual comparisons, tracking and diagnosis of potential issues.
Get more information about optomap.