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Disp III test
ocular motility
| Question | Answer |
|---|---|
| Ocular Motility | movements of the eye in all directions of gaze and its relationship in movement with the other eye. |
| what does the name Orthoptics mean broken down in greek? | ortho= striaght, optics= eye |
| definition of Orthoptics? | science that investigates the motor and sensory adaptations of the eyes. deals with training the patient to use both eye together to obtain comfortable binocular vison. |
| Strabismus can be treated with what type of exercise? | Orthoptics |
| improvement of visual aquity is greatest in the first ____ years? | TWO |
| Visual aquity gets normal by age _____? | FIVE |
| Newborns will turn their head toward bright light because why? | because they can usually just detect bright light |
| at 6 weeks old they can make ____ following movements of their eyes; because they are following or tracking a light. | irregular |
| at what age can babies make smooth following movements? | 3 months |
| 4-6 months babies will start to develop __/___ coordination and will start to reach for objects. | hand/eye |
| at 9 months babies have about a ___/___ visual acuity and can see the big E. | 20/200 |
| At one year old their visual acuity is ___/___? | 20/100 |
| At two years old their visual acuity is ___/___? | 20/40 |
| At three years old their visual acuity is ___/__? | 20/30 |
| by age 5 their visual acuity should be ____/___? | 20/20 |
| What are the three steps of assessment of binocular vision? | 1.Grade 1 2.Grade 2 3.Grade 3 |
| describe Grade 1 of the assessment of binocular vision? | have simultaneous macular perception (both eyes being used at the same time) |
| describe Grade 2 of the assessment of binocular vision? | simultaneous macular perception plus fusion |
| describe Grade 3 of the assessment of binocular vision? | simultaneous macular perception plus fusion plusdepth perception |
| definition of suppression ? | not using one eye (brain shuts off the input from an eye ) |
| definition of diplopia ? | double vision (can cause supression) |
| ______ causes amblyopia ? | supression |
| if the eye shuts vision off long enough amblyopia becomes _______? | Amblyopia Exanopsia |
| what is amblopia exanopsia? | permanent loss of vision in that eye |
| this is the determination of a patients field of vision by a 2 dimensional mapping of their entire viewing area? | Visual Fields |
| What are the 4 Preliminary Procedures? | 1.Generally describe patients behavior 2.check visual acuity 3.check color vision 4.purpose person is receiving visual field test |
| Do you need equipment for the confrontation test? | NO special equipment needed |
| 5 steps of the confrontation test? | 1.Face pat 2' apart 2.Opposite eyes are occluded& each fiaxates on the others open eye 3.examination moves their finger 4.Patient should have back toward the light or light source 5.all 4 quadrants should be tested |
| Perimeter (field plotting device) is used how? | eye at center of rotation of a hemisphere with a radius of 33cm. |
| the perimeter tests what? | tests peripheral and central fields |
| What does the tangent screen test? | tests for central 30 degrees of field |
| should patient wear their glasses for the tangent screen test? | YES |
| what is the screen for the tangent screen made out of? | black felt |
| the tangent screen test is conducted __to __ meters from the eye? | 1-2mm |
| the test objects for the tangent screen test are __/__ from 1 to 50 mm in diameter? | disks/balls |
| the test object is held with a ___ and is the test object is also a flat black color. | wand |
| at a distance of 1 meter the average blind spot is 12-15 degrees ____ ? | temporally |
| black pins can be inserted into the screen to indicate ___ ? | blind spots |
| What is Isopter? | map of circumference of a visual field determined by a test object of a certain size and with the patient at a certain distance from the tangent screen |
| isopter is noted as a ____. | fraction |
| in the isopter the numerator is __ and denominator is ____?(both in mm) | numerator is size of object, denominator is distance from patient to screen |
| explain what Harrington Flicks Visual Field Screener Quick Rough Test is? | 10cards, patient fixates on central dot, light is turned on in box for short time |
| Amsler Chart detects what two things? | field anomalies in central 20 degrees of viisual fields and detects microscopic area of macular or perimacular edema |
| in normal visual field the average peripheral limits are what? | 95 degrees temporally 75 degrees downward 60 degrees inward 60 degrees upward |
| binocular field width is about ____ degrees? | 190 |
| absolute visual fields are obtained by rotating the ___ and __? | eye, head |
| in Pathological Visual fields if field loss results from something in front of the retina the patient has a sensation of see something ____ blocking their vision? | DARK |
| In Pathological Visual Fields if the loss is due to damage of the optic nerve or brain there is a loss of vision but no sensation of ____? | BLACKNESS |
| In Pathological Visual Fields with ___ disease both types of vision loss can occur | retinal |
| Define Scotoma? | area of partial or complete blindness within the confines of a normal visual field |
| what does broken through mean when referring to scotoma? | it means scotoma has reached the peripheral/periphery |
| complete blindness is also known as what? | absolute scotoma |
| what are the 5 types of scotoma? | 1.Central 2.Pericentral 3.Paracentral Scotoma 4.Cecal 5.Arcuate |
| Central Scotoma involves the ___ area and always results in decreased VA? | fixation |
| Pericentral Scotoma is scotoma around the ___ area? | fixation |
| Paracentral Scotoma is scotoma to __ side of the fixation area? | one |
| Cecal Scotoma involves the area of the ___ blind spot ? | normal ( attached to the blind spot) |
| Arcuate (Bjerrum/comet type) scotoma extends around the fixation area from the blind spot to the ___ side in an __? | nasal side, arc |
| the arc shape in Arcuate Scotoma usually occurs __ or __ the fixation point? | above, below |
| intensity of scotoma can range from ___ blindness to ___ any blindness? | Absolute, barley any |
| if scotoma is not total/absolute it is called ____ scotoma? | relative |
| What is contraction of visual field ? | blindness starting at periphery and invading the field toward the center |
| this occupies half of the visual field and is almost always bilateral? | hemianopic |
| What is homonymous ? | blindness starting at periphery at the same side in both eyes |
| What is Heminopia? | blindness in right half of both visual fields |
| what is congruous? | defects in both visual fields are superimposable(same size and shape) |
| visual field defect due to patients emotional status? | hysterical visual field |
| typical hysterical field is 10-20 degrees ____ central vision? | tubular |
| ____ remains the same regardless of test distance in hysterical visual fields? | SIZE |
| if visual field increases at greater distances (tunnel vision) you could suspect what three things? | 1.syphilis 2.Retinitis Pigmentation 3.Glaucoma |
Created by:
Britt7
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