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The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
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Corrective lens
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A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and pres
A pair of contact lenses, positioned with the concave side facing upward
A pair of contact lenses, positioned with the concave side facing upward
Typical pair of single vision glasses
Typical pair of single vision glasses
These bifocals are upside down as they rest on the surface. The add segment of the lens for near vision is the D-shaped area.
These bifocals are upside down as they rest on the surface. The add segment of the lens for near vision is the D-shaped area.
Prismatic color distortion shown with a camera set for nearsighted focus, and using -9.5 diopter eyeglasses to correct the camera's myopia.
Prismatic color distortion shown with a camera set for nearsighted focus, and using -9.5 diopter eyeglasses to correct the camera's myopia.
Eyeglass prescription
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An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispen
Corrective lens
…lenses are surgically implanted most commonly after cataract removal but can be used for purely refractive purposes. Corrective lenses are typically prescribed by an ophthalmologist or an optometrist. The prescription consists of all the specifications necessary to make the lens. Prescriptions typically include…
Using a phoropter to determine a prescription for eyeglasses
Using a phoropter to determine a prescription for eyeglasses
This phoropter is set to an axis of 180 for each eye. This can be seen by noticing the tiny white arrows that are horizontal as they point to the tiny
This phoropter is set to an axis of 180 for each eye. This can be seen by noticing the tiny white arrows that are horizontal as they point to the tiny numbers that line the opening the patient looks through. Click the image to see a full resolution version where the individual axis markings become more visible.
An eyeglass prescription
An eyeglass prescription