The endothelium serves three main purposes it regulates the stroma's water content, provides a barrier to ingress of several constituents of the aqueous humor, and actively transports glucose. A secondary refractive procedure performed after the initial one in an attempt to achieve better visual acuity. The outermost layer of cells of the cornea. Ghosting A distortion of image due to irregular healing of the corneal surface. A complication of refractive surgery in which the patient sees additional luster around lights.
Glare is a subjective experience that often decreases with time.
Globe The eyeball. Halos A complication of refractive surgery in which the patient sees additional rings around lights at night. Halos are subjective experiences that often decrease with time. An ophthalmologist can measure the haze response of a patient's eye under a slit lamp, but patients' experiences of haze vary. Outcomes for the patient include decreased night vision, halos or loss of best corrected visual acuity.