Correcting vision defects Flashcards
1
Q
What is hyperopia?
A
Long-sightedness and it is when you are unable to focus on near objects as the lens doesn’t refract enough or the eyeball is too short
2
Q
What is myopia?
A
Short-sightedness and it is when you are unable to focus on distant objects as the lens refracts light too much or the eyeball is too long
3
Q
How are long and short sightedness treated?
A
Long-sightedness is treated with glasses that have a convex lens and short sightedness is treated with glasses that have a concave lens
4
Q
How do glasses help?
A
They focus light rays onto the retina
5
Q
What are alternatives to glasses?
A
Contact lenses, laser eye surgery and replacement lens surgery
