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Diagnostic Procedures for Vision and The Eyes - Coggle Diagram
Diagnostic Procedures for Vision and The Eyes
Diagnostic Procedures for Vision
Snellen Chart
First Number
Standard distance from chart
20 feet from patient
Second Number
Deviation from norm
Ability to read smaller lines letter on the chart
Measure visual acuity
20/20 normal
Refraction Test
Determine eyes's refractive error
Used to make spectacle
Diopter
Unit measurement lens refractive power
Cover Test
Test of how 2 eyes operate
Patient will focus on object from far while cover one eyes
Visual Field Testing
Determine losses peripheral vision
Diagnostic Procedures for the Eyes
Sit-Lamp Ophthalmoscopy
Detect foreign bodies
See infected
Injured area in eyes
Fluorescein Staining
Dye make corneal abrasion
Appear as bright green temporarily
Mydriatic Drops
Forcing pupils remain dilated
Produce temporary paralysis
Fluorescein Angiography
Photographic study blood vessels
Need contrast medium
Determine proper circulation retinal vessels
Dilation
Needs for examination of interior eyes
Mydriatic Drops make artificial enlargement
PERRLA
RLA: Responsive light accomodation
PER: pupils are equal round
Observation for head injury
Test for damage of brain
Ophthalmoscopy
Use to visually examine fundus
Test include:
Retina
Optic disk
Choroid
Blood Vessels
Tonometry
Measurement intraocular pressure
High pressure is glaucoma