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Generally speaking, healthy adults should get eye exams every two to three years, says Adair. There are some ways to protect the eyes from strain or other symptoms associated with prolonged screen ...
Experts say there are ways to improve visual comfort without the glasses: Vary the types of things you are focusing on, or your field of vision. Looking at a computer all day only engages a ...
Even people who don't need eyeglasses for vision issues are donning specs these days. While some may be using non-prescription glasses as a fashion statement, others may actually be using blue ...
Distance PD is the separation between the visual axes of the eyes in their primary position, as the subject fixates on an infinitely distant object. Near PD is the separation between the visual axes of the eyes, at the plane of the spectacle lenses, as the subject fixates on a near object at the intended working distance.
Color blindness (color vision deficiency) is the decreased ability to see color or differences in color. It can impair daily color tasks such as selecting ripe fruit or choosing clothing, as well as safety-related tasks such as interpreting traffic lights. While the disability of color blindness is considered minor, the use of color in safety ...
Eyeglass prescription. Using a phoropter to determine a prescription for eyeglasses. 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 dispense corrective lenses appropriate for a patient.