Eye diseases

Question 1

What is a refractive error?

Name the 3 kinds?

Answer 1

An imbalance between corneal curvature & length/shape of the eyeball = light cannot focus on the retina in one spot

1. Myopia
2. Hyperopia
3. Astigmatism

Question 2

What is the pathophys, visual experience & treatment for Myopia?

Answer 2

Pathophys: Flat cornea/long eyeball = light rays focus in front of the retina

Causes image to be defocused in distance; focused for near

Treat = minus lens (-D)

Question 3

Pathophysiology, visual experience & treatment for Hyperopia?

Answer 3

Light focus in behind the retina; short eyeball or steep cornea

Plus lens (+D)