if you wear minus lenses for distance vision(lets say -3.00) and you wear plus lenses of the same power over the minus lenses (lets say you wear a plus power of +3.00 over a minus lens of -3.00), will that give you the vision you currently have without any lenses at all?
2007-02-05 10:32:12 · 4 answers · asked by tim 3 in Science & Mathematics ➔ Medicine
Yes. That's why myopic people usually do not need reading glasses in their 40's...they need minus lenses to see in the distance all their lives and plus lenses added (bifocals) to read in the 40's. That's the math
2007-02-10 08:30:42 · answer #1 · answered by hwfiedler 5 · 0⤊ 0⤋
it relatively is not any longer a touch lens prescription. you may desire to purchase the contacts that your wellbeing practitioner prescribes simply by fact relatively everyone has distinctive eye sizes and styles. donning a touch this is in basic terms too tight or too unfastened can do severe harm on your eyes. variety of contacts additionally concerns. in basic terms your wellbeing practitioner has considered your eyes and is familiar with in case you have hypersensitive reactions or dry eyes which would be sure what variety of contacts you place on. Legally, your wellbeing practitioner is accountable on your touch lens placed on, you're in basic terms allowed to purchase the variety of contacts they prescribe, they require a prescription specifying a variety, base curve, diameter, and powers. you may no longer purchase lenses without this suggestion.
2016-10-01 11:45:46 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Yes, the cancel each other out!!
2007-02-10 12:36:59 · answer #3 · answered by ilovepoison2820 5 · 0⤊ 0⤋
Yes, they cancel each other out.
2007-02-05 11:44:55 · answer #4 · answered by badabingbob 3 · 0⤊ 0⤋