Test 13

1. Conditions that cause a superior visual field defect include: a. ptosis b. dermatochalasis c. lens rim artefact d. branch retinal vein occlusion e. cataract answera.T   b.T   c.T   d.T   e.F In addition to glaucoma, one needs to be aware  of conditions that can give rise to a superior visual field defect as mentioned above.     2. The following abnormalities and their automated perimetry appearances are      true: a. peripapillary atrophy and increased blind spot b. nuclear sclerosis and generalized central depression c. retinitis pigmentosa and peripheral depression d. glaucoma and increased pattern standard deviation e. age-related macular degeneration and central scotoma answera.T   b.T   c.T   d.T   e.T Increased pattern standard deviation highlights the localized visual field defects.   3. The following conditions can give rise to visual field defect       indistinguishable from glaucoma: a. optic nerve head drusen b. retinal vein occlusion c. ischaemic optic neuropathy d. cerebrovascular accident e. myelinated retinal nerve fibres. answera.T   b.T   c.T   d.F   e.T Cerebrovascular accident causes homonymous hemi or quadrinopia.     4. Pituitary disease can give rise to: a. bitemporal quadrinopia. b. diplopia c. see-saw nystagmus. d. incongruous homonymous hemianopia e. junctional scotoma answera.T   b.T   c.T  d.T   e.T Depending on the location of the tumour, various visual field  defect can occur. See-saw nystagmus is a characteristic but unusual feature of  pituitary disease. Hemifield slips give rise to diplopia.   5. An increase in the mean deviation on automated threshold perimetry      occurs in the following conditions: a. glaucoma progression b. change in refraction c. cataract progression d. use of pilocarpine e. use of beta blocker. answera.T   b.F   c.T   d.T   e.F Change of refraction does ot cause an increased mean deviation provided the refraction is corrected during the perimetry.  Beta-blocker does not alter the size of the pupil and therefore does not affect the mean deviation   Return to the main page