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Description of the intraocular pressure test A tonometer is used to measure the pressure. Intraocular pressure test Determines the amount of pressure within the eye aids in diagnosis of glaucoma. Nystagmus is a normal finding for the far lateral gaze.

Nursing implications for the extraocular muscle function test Observe for parallel eye movements and any deviation of movement. Extraocular muscle function test Used to test the function of the extraocular muscles Description of extraocular muscle function test Ask patient to hold head still and move eyes to follow small object to each of the six cardinal points: right upward and right down and right left upward and left down and left. Nursing implications for the visual acuity test Explain procedure have patient cover one eye start with third line, progress downward. 20/20 indicates normal vision 20/200 with correction is legally blind. Visual acuity expressed as a fraction, numerator indicates distance between patient and chart, denominator indicates distance at which 20/20 vision can be read. Visual acuity test Determines the status of vision Description of the visual acuity test The Snellen eye chart is used. Danger signals of eye disease Persistent redness of the eye continuing pain or discomfort disturbance of vision colored light flashes crossing of the eyes growths on the eye or eyelids visible opacities continuing crusting, discharge, or tearing unequal pupil size. Caused by decreased muscle tone and decreased elasticity. Ptosis Drooping of the upper lid to a point where it interferes with vision. Occurs because of loss of muscle tone and elasticity.