The loss of peripheralvision and myopia are reversible, while cataracts are a delayed complication. … One of the advantages of a full-face diving mask is prevention of regulator loss in the event of a seizure. … Symptoms may include disorientation, breathing problems, and vision changes such as myopia.
Since the outer area of the retina is made up of more rods than cones, loss of peripheralvision often results in night blindness. … Contrast vision may also be greatly reduced. … Retinitis pigmentosa
Certain medications, such as phenothiazines
Cataract (peripheral cortical)
Refractive surgery (LASIK … 
Symptoms such as peripheralvisionloss may not be apparent until severe optic nerve damage occurs. … Studies have shown that loss of more than 40% of optic nerve fibers is necessary to produce symptoms, and patients report a gradual loss of peripheralvision that is often … perceived as tunnel vision.
Loss of VisionLoss of PeripheralVision
Development of tunnel vision that occurs due to loss of peripheralvision. … Non-syndromic RP usually presents a variety of the following symptoms:
Night blindness or nyctalopia;
Tunnel vision (due to loss of peripheralvision);
Latticework vision; … No pain is associated with visionloss.
Some patients may have normal central vision with complaints of loss of peripheralvision to one side in the superior or inferior fields. … Major symptoms are sudden loss of vision (partial or complete), sudden blurred or "foggy" vision, and pain on movement of the affected eye. … Contrast sensitivity and color vision: Both reduced, sometimes more severely than the loss of visual acuity.
This condition may progress to loss of peripheralvision and blindness. … With increasing fluid pressure, patients may experience headaches, blurry vision, and other visual problems. … The lack of development, or complete absence of fingernails results from the loss of function mutations in the LMX1B gene.
The need for removal becomes very urgent if the symptoms exhibited by the patient include visual loss. … Balance disorder
Headache (obstructive hydrocephalus)
Polyuria (diabetes insipidus)
Vision … loss (bitemporal hemianopia)
post surgical Weight gain
The histologic pattern consists of nesting of squamous epithelium bordered by radially arranged cells.