Certified Ophthalmic Technician Exam Review Newest 100%

Certified Ophthalmic Technician Exam Review Each mm on the retina is equal to how many degrees on the visual field? a) 2 degrees b) 3 degrees c) 4 degrees d) 5 degrees - The light receptor cells of the retina are the: a) Retinal pigment epithelium b) Rods and cones c) Bipolar cells d) Ganglion cells - An object on the patient's right will be perceived by the patient's: a) Temporal retina OU b) Nasal retina OU c) temporal retina OS and nasal retina OD d) Foveae OU - The nerve fibers are axon extensions of the: a) Rods and cones b) Ganglion cells c) Bipolar layer d) Mueller cells - (Blank) - (Blank) (Blank) - (Blank) The autonomic pattern of the nerve fibers produces visual field defects: a) That are total blind spots b) That correspond to the location of the rods and cones c) That correspond to the location of the nerve fibers d) That respond well to treatment - The "blind spot" as plotted on a visual field test corresponds to: a) The macula b) The fovea c) The optic disk d) The lamina cribosa - The size of the average blind spot is: a) 5.5 degrees wide and 7.5 degrees high b) 7.5 degrees wide and 5.5 degrees high c) 3.5 degrees wide and 5.5 degrees high d) 7.5 degrees wide and 10.5 degrees high - On the visual field, the average blind spot is located: a) 25 degrees temporal to fixation b) 5 degrees nasal to fixation c) 15 degrees nasal to fixation d) 15 degrees temporal to fixation - If you increase the visual field testing distance, the blind spot will: a) Stay the same in both cm and degrees b) Get larger in both cm and degrees c) Get larger in cm but remain the same in degrees d) Stay the same in cm but get larger in degrees - At the chiasm: a) Nerve impulses are magnified before traveling on to the brain b) Nerve impulses are sorted before traveling on to the brain c) Nasal nerve fibers from each eye cross over to the opposite side d) Temporal nerve fibers from each eye cross over to the opposite side - The gland that lies in the chiasmal region and can have a direct impact on the visual field is the: a) Thyroid b) Pituitary c) Adrenal cortex d) Hypothalamus - The characteristic visual field defect due to a lesion at the chiasm is: a) Bitemporal hemianopsia b) Binasal hemianopsia c) Left hemianopsia d) Right hemianopsia - After nerve fibers cross at the chiasm, they pass next through the: a) Lamina cribosa b) Optic tract c) Optic radiations d) Optic nerve - As the nerve fibers pass through the optic tract, they: a) Intensify the light impulses b) Rotate, thus changing position c) Cross over to the other side of the brain d) Pass under the pituitary gland - After leaving the optic tract, the nerve fibers bundle together at a "relay station" known as the: a) Optic radiations b) Optic disk c) Visual cortex d) Lateral geniculate body - The layers of the lateral geniculate body nucleus are divided so that half of the layers are made up of crossed fibers, and half are made up of uncrossed fibers. How many layers are there? a) Four b) Six c) Eight d) Ten - Which of the following is not true regarding the nerve fibers once they exit the lateral geniculate body? a) The tract continues to rotate b) They fan out forming the optic radiations c) The temporal lobe fibers from Meyer's loop d) They enter the brain tissue - Visual nerve fibers terminate at the: a) Brainstem b) Occipital cortex c) The temporal lobe fibers from Meyer's loop d) They enter the brain tissue - Visual field defects become more congruous: a) If both optic nerves are affected b) If the intraocular pressure (IOP) in both eyes is elevated c) If the lesion is in one eye only d) The closer the lesion is to the occipital cortex - Sensory input (light impulses) on the patient's left is transmitted to the: a) Temporal retina OS and nasal retina OD b) Left side of each retina c) Left optic tract d) Right side of the brain - The boundary of an area that responds to the same stimulus intensity is called an(n): a) Isopter b) Scotoma c) Decibel d) Homonymous - An area inside a visual field isopter that does not respond to any of the targets available on that particular machine is termed a: a) Contortion b) Constriction c) Bjerrum's d) Scotoma - "At threshold" means that the patient responds to a given stimulus in the same area: a) 25% of the time b) 50% of the time c) 75% of the time d) 100% of the time - An apostilb is a measurement of: a) Target size b) Target value c) Light intensity d) Target color wavelength - The arbitrary decibel unit is used to denote stimulus intensity in: a) Automated perimetry b) Goldmann perimetry c) Tangent screen testing d) Confrontation visual fields -