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If the natural lens is left in the eye, the IOL is known as phakic, otherwise it is a pseudophakic lens (or false lens). Both kinds of IOLs are designed to provide the same light-focusing function as the natural crystalline lens. [1] This can be an alternative to LASIK, but LASIK is not an alternative to an IOL for treatment of cataracts.
Replacement of the lens as treatment for cataract can cause pseudophakic macular edema (‘pseudophakia’ means ‘replacement lens’). This could occur as the surgery involved sometimes irritates the retina (and other parts of the eye) causing the capillaries in the retina to dilate and leak fluid into the retina. This is less common today ...
The one and a half syndrome is a rare weakness in eye movement affecting both eyes, in which one cannot move laterally at all, and the other can move only in outward direction. More formally, it is characterized by " a conjugate horizontal gaze palsy in one direction and an internuclear ophthalmoplegia in the other ".
The EVO ICL (STAAR® Surgical's phakic IOL) is implanted under pharmacological mydriasis and implanted in the retropupillary position, between the eye's iris and the crystalline lens, using cartridge-injector or forceps. Both eyes can usually be done on the same day. Steroid antibiotic eye drops are usually prescribed for 2–4 weeks after surgery.
The third and fourth Purkinje images can be visible from within the eye itself. Light reflected away from the surfaces of the lens can in turn reflect back into the eye from the rear surface of the cornea. The first and fourth Purkinje images are used by some eye trackers, devices to measure the position of
Sympathetic ophthalmia (SO), also called spared eye injury, is a diffuse granulomatous inflammation of the uveal layer of both eyes following trauma to one eye. It can leave the affected person completely blind. Symptoms may develop from days to several years after a penetrating eye injury. It typically results from a delayed hypersensitivity ...
Pseudoexfoliation syndrome, often abbreviated as PEX [1] and sometimes as PES or PXS, is an aging-related systemic disease manifesting itself primarily in the eyes which is characterized by the accumulation of microscopic granular amyloid-like protein fibers. [2]
Cupping of the optic disc was found in 89% of DOA patients in at least one of their eyes. [ 6 ] With loss of the central visual fields, there is impairment of color vision in addition to loss of visual acuity varying from mild to severe, typically ranging from 6/6 (in meters, equivalent to 20/20, ft) to 6/60 (20/200, ft) with a median value of ...