Add the bifocal power to the sphere powers.
OD: -0.50
OS: -0.25-0.25x172
Add: +1.75
Change a bifocal Rx to a single vision Rx
Turns into-
OD: +1.25
OS: +1.50-0.25x172
There is a difference of 3 diopters between both eyes; when the vision of the eyes
Anisometropia
differs by a large margin.
Refers to Rx's that differ in sign.
Antimetropia Ex. OD: +0.25
OS: -0.75
Simple Hyperopia The Rx will be a + sphere
Simple Myopia The Rx will be - sphere
Tests to see if both pupils constrict when a light is shined in one eye. Tests for
Marcus Gunn
abnormalties in pupillary reaction.
optotypes letters on the Snellen Chart
Who is said to be the pioneer lens designer Roger Bacon
(1268)
Who is generally credited with the Salvino d'Armati of Florence, Italy (1285)
invention of spectacles?
When were minus or concave lenses 16th century for correction of myopic eyes (nearsightedness)
invented?
When were toric lenses invented and by 19th century by Suscipi
whom?
Who is credited with making the first Benjamin Franklin (1784)
bifocals?
Who aroused the interest of physicians F.C. Donders (1800)
concerning the exam of the eye and
prescribing spectale lenses?
a paramedical technician who designs, fabricates, hand paints, and fits ocular
Ocularist
protheses for those who have lost one or both eyes
photophobia fear of light
iritis an inflammation of the iris.
1/5
, 10/4/24, 8:28 AM
contraocular pertaining to the opposite eye
enophthalmos recession of the eyeball into the orbit
eyes do not maintain parallelism, but take a permanent position of convergence or
heterotropia
divergence
uvetis inflammation involving the uveal tract
hyphema blood in the anterior chamber of the eye
binocular pertaining to both eyes, the use of both eyes simutaneously
anophthalmos abscence of an eyeball (newborn)
aspheric a curve of multiple radii
achromat a totally color blind individual, a lens free from chromatic abberation
hemophthalmia blood (hemmorrhage) within the eye
aniridia complete or partial absence of the iris
endophthalmitis inflammation of the tissues of the internal structures of the eye
ansiotropia unequal turning of the eyes
diplopia double vision
exophthalmos abnormal protrusion of the eyeball outward and forward
hemianopsia blindness in half the visual field of one or both eyes
opthalmoscope an instrument for viewing the fundus and interior of the eye
supraduction an upward rotation of the eye
an instrument for viewing or shinning light on the retina to determine the refractive
retinoscope
state of the eye
keratitis inflammation of the cornea
deformity of the cornea in which it becomes cone shapped, due to stretching of
keratoconus
tissues in its central area.
kerat-;kerato- cornea
blaph-; blapharo- eyelid
lach- tears
dacry- tears (abnormal)
core- pupil
phac- lens
phoria- muscular imbalance
heterophoria the tendency for one eye to deviate as the other remains fixed
exophoria muscular imbalance where an eye has a tendency to move outward
hyperphoria tendency for one eye to deviate upward
orthophoria normal muscular balance and alignment of the eyes with no tendency to deviate
keratoscope instrument for examining the curvature of the cornea
dicoria two pupils in one eye
blepharedema abnormal excess of watery fluid in the tissue spaces of the eyelid.
hypophoria tendency for one eye to deviate downward
2/5
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