OPT-2375 Refractometry Unit 3 Flashcards
An example of an objective refraction is:
retinoscopy or autorefraction
T/F: Fogging or cyclopligics is commonly used to bring out latent hyperopia to manifest.
True
T/F: Pseudomyopia can be corrected using minus lenses.
False
A place where there is a high incidence of myopia is:
China
All of the following conditions require full correction of hyperopia except:
maximum acuity needed at distance
T/F: Of all of the refractive errors, myopia is the only one to show definite environmental factors on the incidence, distribution, degree and changes.
True
Hyperopia that is uncovered during a cycloplegic refraction and is added to the latent hyperopia is known as:
total
An astigmatic correction with its steepest power at 90 degrees is considered:
with the rule
The most common refractive error in the general population is:
astigmatism
A place where there is a low incidence of myopia is:
Africa
An astigmatic correction with its steepest power at 180 degrees is considered:
against the rule
T/F: Asthenopia is a symptom of an uncorrected refractive error.
True
Methods that have been used to control myopic progression include all of the following except:
base out prism
The most stable refractive error which rarely changes over time is:
Astigmatism
T/F: Pseudomyopia is a condition of on-going spasm of accommodation and required plus lenses to correct.
True
