myopia vs hyperopia

[plzNOCarribbean]

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Hey everyone, hoping someone can clear things up for me about this.

I've heard from my friends who've taken the mcat and from my mcat instructors that optics is pretty high yield. I've heard that the ? mainly pertain to eye problems and i'm confused as to how hyperopia differs from presbyopia.

aren't both of them essentially farsightedness? and doesn't farsightedness mean that you can't see images that are close (and nearsightedness mean you can't see images that are far)?

also, for a hyperopic or presbyopic eye, since the image falls behind the eye, what kind of lens would you use to correct it? is it the same lens for both cases, even though the two are classified as different diseases?

sorry if that was long, but I was confused bc wikipedia said that hyperopia (also farsightedness) is often confused with presbyopia, which is also farsightedness.....

 

[jphwki82]

Hey everyone, hoping someone can clear things up for me about this.

I've heard from my friends who've taken the mcat and from my mcat instructors that optics is pretty high yield. I've heard that the ? mainly pertain to eye problems and i'm confused as to how hyperopia differs from presbyopia.

aren't both of them essentially farsightedness? and doesn't farsightedness mean that you can't see images that are close (and nearsightedness mean you can't see images that are far)?

also, for a hyperopic or presbyopic eye, since the image falls behind the eye, what kind of lens would you use to correct it? is it the same lens for both cases, even though the two are classified as different diseases?

sorry if that was long, but I was confused bc wikipedia said that hyperopia (also farsightedness) is often confused with presbyopia, which is also farsightedness.....

Different mechanisms can lead to the same manifestation, i.e. farsightedness. Presbyopia is associated with the natural aging process. While hyperopia is a genetic defect in the eye causing an inability to focus. I wouldn't probe much further than this for the MCAT. If it is in a passage, you will be given all the information you will need to answer the questions. I doubt you will need to memorize these specific diseases. Just be able to infer that 2 different mechanisms can yield a similar disease/defect.