All
| Term | Definition |
|---|---|
| Accommodation |
Adjustment of the optics of an eye to keep an object in focus on the retina as its distance from the eye varies. Process of adjusting the focal length of a lens. |
| Amblyopia |
An abnormal development of spatial vision associated with anisometropia or strabismus in early life. Visual acuity is reduced in the defocused or deviated eye as a result. |
| Astigmastism |
A condition in which imperfections in the cornea of the eye cause light to focus imperfectly on the retina, resulting in blurred vision. |
| Astigmatic Keratotomy (AK) |
Astigmatic keratotomy, or AK, can be used to treat astigmatism. During AK surgery, small incisions are used to change the shape of the cornea, making it more spherical. This treatment is rarely used today due to the development of new treatments. |
| Binocular Vision |
Vision performed with two eyes/sensors whose outputs are often used to extract relative stereoscopic depth. |
| Cataracts |
Cataracts are opacifications of the crystalline lens of the eye, causing a loss of transparency. The crystalline lens is the "focussing" mechanism of the human eye. The change in light transmission is due to accumulation of water and/or denaturation of the lens protein. A variety of factors cause cataracts, eg diabetes, eye trauma, age related changes. |
| Custom LASIK |
Custom LASIK surgery incorporates the use of wavefront-guided technology to create a three dimensional map of vision impairments. This technology allows the surgeon to remove an exact amount of corneal tissue, tailoring the laser vision correction to individual visual flaws. |
| Diopter |
A diopter is a reciprocal meter. It is a measure of the power of a lens or optical system in bringing rays to a focus. The dioptric power of a thin lens is the reciprocal of the distance between the center of the lens and its focal point as measured in meters. |
| Dry Eye Syndrome (DES) |
A condition in which the eye does not produce enough tears. Symptoms of DES include itchiness, scratchiness, stinging, and blurred vision. |
| Emmetropia |
An eye whose image is focused on the retina, rather than in front of behind it. (As opposed to Hyperopia and Myopia). |
Human eye and vision
Refractive errors
Eye diseases and disorders
Eye surgery
Eyeglasses
Contact lenses
