Lesson 11 II Flashcards
As astigmatism correcting lens allows for more power to be provided in the direction where the
Curvature of the corneal surface is the flattest
Plano is used when
Prescription only corrects for astigmatism and client is not hyperopic/myopic
The cylinder power tells the difference between the
Steepest axis of the eye and flattest axis of eye
When a prescription has an add, it indicates that
Prescription is for a bifocal
What form to optometrists write prescriptions in
Minus / negative
What form do ophthalmologists write prescriptions in
Plus / positive
What is symplast myopic astigmatism
There is no astigmatism in one meridian, but 90 degrees away the eye is nearsighted
What is simple hyperopic astigmatism
No no astigmatism in one meridian, but 90 degrees away the eye is farsighted
What is compound myopic astigmatism
Where one is nearsighted in both meridians, but is nearsighted more in one meridian than another
What is compound hyperopic astigamatism
Where people are farsighted in both meridians, but are more farsighted in one than another
What is mixed astigmatism
One meridian is nearsighted where the other one is farsighted
