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Phoropter - ✔✔-measures refraction or how lens should be curved and shaped
to correct vision
- determines Eyeglass Rx, issues w/vision (nearsightedness, farsightedness,
astigmatism)
Retinal Camera - ✔✔- picture of back of eye including retina
- used to document eye diseases
- produces BRIGHT flash when picture is taken
Ophthalmoscope - ✔✔- tool used to examine interior structures of eye,
especially retina
- consists of mirror that reflects light into eye and central hole through which
eye is examined
binocular indirect ophthalmoscope (BIO) - ✔✔an instrument that is worn on the
examiner's head and used to view the back of the eye
Manual Keratometer - ✔✔- determines how flat or steep the cornea is
- measure and diagnose conditions (astigmatism, keratoconus, corneal scarring,
corneal distortion)
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, ** not useful for contact patients
Autorefractor - ✔✔- measures pt's refractive error and RX for eyeglasses or
contact lenses
- achieved by measuring how light is changed as it enters a person's eye
- quick, simple, painless!
Slit Lamp - ✔✔- contains magnifying lens combined w/light source
- examines the eye anatomy
- w/special lenses possible to examine back of eye
Tonometer - ✔✔- measure pressure of eye
- test is used to help Glaucoma
- measures production of Aqueous Humor (liquid found inside eye) and rate at
which it drains into tissue surrounding cornea
Lensometer - ✔✔- measures power of an existing lens
- used to determine the RX of pt's current eyeglasses
- can serve as good baseline for new RX
- can show RX change since last MD visit
Retinoscope - ✔✔- instrument used to examine the retina
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©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.