These are supposed to reduce eyestrain by decreasing glare and improving overall image quality, but do they work?
This discovery had tremendous applications for decreasing light glare at night, polarized sunglasses, camera filters, desk lamps, windows, 3-D motion pictures, and optical devices.
With increasing age, mesopic vision decreases and glare sensitivity increases, hence, older drivers often report visual difficulties during night driving, even in the absence of ocular diseases [ 8].
An increase of the average UDI for a typical room up to 71.8% and a decrease of intolerable glare levels (DGP higher than 0.45) down to 12% were the major benefits of the substitution of traditional clear glasses with integrated PVCCs.
These changes lead to decreased light sensitivity, increased glare sensitivity, reduced visual acuity, and prolonged dark adaptation [ 1, 2].
For example glare and decreased contrast sensitivity often affect cataract patients more than expected, especially in extremes of illumination (Rubin et al 1993).
26, 27 Normal visual changes that occur with aging include presbyopia, decreased contrast sensitivity, decreased dark/light adaptation, and delayed glare recovery.
Nevertheless, there are still some drawbacks of OK lens, such as risk of cornea damage, infection and decreasing of cornea endothelium cell count; glare at night or vision decrease at evening are seen in OK lens users sometimes.
They may stay dormant in the cornea for months or years, or they may cause acute symptoms such as decrease in visual acuity, halo, glare, and photophobia [ 3, 4].
To examine preoperative risk factors for decreased satisfaction and symptoms of glare, halos, and/or starbursts after laser in situ keratomileusis (LASIK).
