1. Change a bifocal Rx to a single vision Rx
Answer: Add the bifocal power to the spherepowers.
OD: -0.50
OS: -0.25-0.25x172
Add: +1.75
Turnsinto-OD: +1.25
OS: +1.50-0.25x172
2. Anisometropia
Answer: There is a d
...
1. Change a bifocal Rx to a single vision Rx
Answer: Add the bifocal power to the spherepowers.
OD: -0.50
OS: -0.25-0.25x172
Add: +1.75
Turnsinto-OD: +1.25
OS: +1.50-0.25x172
2. Anisometropia
Answer: There is a difference of 3 diopters between both eyes; when thevision of the
eyes differs by a large margin.
3. Antimetropia
Answer:
Refers to Rx's that differ in sign.Ex.
OD: +0.25
OS: -0.75
4. Simple Hyperopia
Answer: The Rx will be a + sphere
5. Simple Myopia
Answer: The Rx will be – sphere
6. Marcus Gunn
Answer: Tests to see if both pupils constrict when a light is shined in oneeye.Tests
for abnormalties in pupillary reaction.
7. Optotypes
Answer: letters on the Snellen Chart
8. Who is said to be the pioneer lens designer (1268)
Answer: Roger Bacon
9. Who is generally credited with the invention ofspectacles?
Answer: Salvino d'Armatiof Florence, Italy (1285)
10. When were minus or concave lenses invented?
Answer: 16th century for correctionof myopic eyes (nearsightedness)
11. When were toric lenses invented and by whom?
Answer: 19th century by Suscipi
12. Who is credited with making the first bifocals?
Answer: Benjamin Franklin (1784)
13. Who aroused the interest of physicians concerning the exam of the eyeand
prescribing spectale lenses?
Answer: F.C. Donders (1800)
14. Ocularist
Answer: a paramedical technician who designs, fabricates, hand paints, andfits
ocular protheses for those who have lost one or both eyes
15. Photophobia
Answer: fear of light
16. Iritis
Answer: an inflammation of the iris.
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