The upper eyelid should be included in assessments of meibomian gland health, according to a review published in Cornea.Even ...

Dry eye is very common, especially post corneal refractive surgery, and should be treated preoperatively with attention paid ...

Cones outnumber rods only in the center of the retina, which is the area of greatest density. It is also the area most heavily used by daytime, direct vision. But rods do fire during the day, ...