ABO EXAM PRACTICE TEST

ABO EXAM PRACTICE TEST Name the 3 types of tunics of the eye, and what areas of the eye they consist of. - CORRECT ANSWER-1. Fibrous: cornea and sclera (outer protective coating) 2. Vascular: iris, ciliary body and choroid (uveal tract) 3. Neural: retina During accommodation, what 3 things do the eyes do? - CORRECT ANSWER-1. Ciliary muscle relaxes allowing for thickening of crystalline lens 2. Eyes converge 3. Pupils constrict What happens with Aniseikonia? - CORRECT ANSWER-The ocular image of an object with one eye differs in size/shape from the other eye; cannot fuse into one image. Difference between Anisemetropia and Antimetropia? - CORRECT ANSWER-1. Anisemetropia: refractive errors differ greatly, but same sign. 2. Antimetropia: signs in each eye is different; one plus one minus. What is diplopia? - CORRECT ANSWER-Seeing double vision What do Iseikonic lenses do? - CORRECT ANSWER-Manipulate image size when dissimilar sizes makes it difficult to fuse images. What is a scotoma? - CORRECT ANSWER-A blind area of reduced vision in the visual field "Fusion" occurs where? - CORRECT ANSWER-In the brain The aqueous fluid is continually being manufactured by what? - CORRECT ANSWERThe ciliary body The space between the back of the iris and the front of the lens which is filled with aqueous is the what? - CORRECT ANSWER-Posterior chamber The transparent, colorless mass of soft, gelatinous material which fills the eyeball behind the lens is the: - CORRECT ANSWER-Vitreous humor What is the index of refraction for parts of the eye: cornea, crystalline lens, aqueous humor, vitreous humor. - CORRECT ANSWER-Cornea: 1.37 Crystalline lens: 1.42 Aqueous humor: 1.33 Vitreous humor: 1.33 Metric system: One meter is equal to... - CORRECT ANSWER-One meter= 39.37 inches (1 inch=25.24mm) One meter= 10 decimeters or .1 100 centimeters or .01 1000 millimeters or .001 micro (millionth) or .000001 nanometers (billionth) or . 1mm=1 million nanometers 1 kilo=1,000 meters The visual spectrum of light is measured in: The wavelength range of the visible spectrum is from _ to _? Range of long UV? - CORRECT ANSWER-1. nanometers 2. 390-750 nanometers 3. 295-390 nanometers What are the colors of the spectrum of visible white light and their nanometer? - CORRECT ANSWER-R 660 O 610 Y 560 G 510 B 460 V 380 Give the index of refraction for: Air Crown Glass CR-39 Poly High Index Plastic Flint Glass - CORRECT ANSWER-Air=1.00 Cr-39=1.490 Crown Glass= 1.523 Poly=1.586 High Index=1.60 Flint=1.805 One prism diopter is equal to: - CORRECT ANSWER-1cm/1m=1 prism diopter Plus lenses create