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Medical Forum / General / Vision / September 2006newbie to contacts lens fitting...
Hi.. Just find out about this goggle group. I am in my early 40's and starting to try contact lens. My nearsighedness is not too severe (-2.75 - sphere, both eyes) but I have astigmatism. I believe it is -1.75 (OD), and -1.25 (OS)... Can someone enlighten me about the meaning of "OD" and "OS"? I think they are related to "left" and "right" eyes?? I have tried my 1st pair of contact lens and it seems to be unacceptable at work (indoors) - particularly hard to read documents/texts and computer screen. I also find my vision clearer outdoors (sunny for the entire week).. I see my optometrist today for a 2nd time and he has given me a 2nd pair of contacts to try out. Frankly, I have been trying out the entire afternoon... so far.. similar results - outdoors vision seems to be much better. but when indoors (shopping mall, or home), then it's much harder to read text or computer screen (unfocused images of text). My questions are: - is my experience unusual? or it's common to try out a few pair of lens to find the right one? - how many trials is considered "normal" during the fitting process? I will return to see my optometrist a week later and see how things go. I am just feeling antsy about the outcome.... Would be great to hear about others' experience. Thanks for sharing. will ps: The lens that I am trying are ProClear toric. Has your eyecare practitioner tested you for presbyopia (loss of close-up vision, which naturally begins in one's 40s)? When I hit 40, I could barely read with my distance contacts in (or glasses on). I tried 4 different types of contacts before I settled with Acuvue 2. I wear one for distance and 1 for close-up. This system is called monovision, and it works well for me. -Tom in Scranton, PA USA > Hi.. > Just find out about this goggle group. [quoted text clipped - 29 lines] > will > ps: The lens that I am trying are ProClear toric. hi tom. thks4 your reply. i'll check with my optometrist next time about presbyopia. i think he mentioned the possibility last time that was 2 yrs ago!! and i am 42yo going to 43 by yr end. cheers w. > Has your eyecare practitioner tested you for presbyopia (loss of > close-up vision, which naturally begins in one's 40s)? When I hit 40, I [quoted text clipped - 39 lines] > > will > > ps: The lens that I am trying are ProClear toric. will schreef: > I am in my early 40's and starting to try contact lens. > My nearsighedness is not too severe (-2.75 - sphere, both eyes) but I > have astigmatism. I believe it is -1.75 (OD), and -1.25 (OS)... Can > someone enlighten me about the meaning of "OD" and "OS"? I think they > are related to "left" and "right" eyes?? OD = Oculus Dexter meaning the eye(Oculus) to the right(Dexter). OS = Oculus Sinistre meaning the eye to the left. > I have tried my 1st pair of contact lens and it seems to be > unacceptable at work (indoors) - particularly hard to read > documents/texts and computer screen. Myopic people at your age and changing from glasses, like your prescription, to contactlenses don't have the comfort of the accomodation help provived when wearing glasses. Normally this should be told before you are fitted. I also find my vision clearer > outdoors (sunny for the entire week).. I see my optometrist today for a > 2nd time and he has given me a 2nd pair of contacts to try out. [quoted text clipped - 3 lines] > indoors (shopping mall, or home), then it's much harder to read text or > computer screen (unfocused images of text). Has to do with the pupildiameter, the smaller the diameter the more depth of (sharp)field (like in photography with aperture) Outside the light intensity is higher and therefore the pupil has a smaller diameter. The same insides when you switch on the lamp. > My questions are: > - is my experience unusual? No or it's common to try out a few pair of > lens to find the right one? Depends on the skills of your fitter. > - how many trials is considered "normal" during the fitting process? Depends on the difficulty of your prescription and what you want to be fixed. > ps: The lens that I am trying are ProClear toric. An excellent lens. Jan (normally Dutch spoken) will schreef: > I am in my early 40's and starting to try contact lens. > My nearsighedness is not too severe (-2.75 - sphere, both eyes) but I > have astigmatism. I believe it is -1.75 (OD), and -1.25 (OS)... Can > someone enlighten me about the meaning of "OD" and "OS"? I think they > are related to "left" and "right" eyes?? OD = Oculi Dexter meaning the eye(Oculus) to the right(Dexter). OS = Oculi Sinistre meaning the eye to the left. > I have tried my 1st pair of contact lens and it seems to be > unacceptable at work (indoors) - particularly hard to read > documents/texts and computer screen. Myopic people at your age and changing from glasses, like your prescription, to contactlenses don't have the comfort of the accomodation help provived when wearing glasses. Normally this should be told before you are fitted. I also find my vision clearer > outdoors (sunny for the entire week).. I see my optometrist today for a > 2nd time and he has given me a 2nd pair of contacts to try out. [quoted text clipped - 3 lines] > indoors (shopping mall, or home), then it's much harder to read text or > computer screen (unfocused images of text). Has to do with the pupildiameter, the smaller the diameter the more depth of (sharp)field (like in photography with aperture) Outside the light intensity is higher and therefore the pupil has a smaller diameter. The same insides when you switch on the lamp. > My questions are: > - is my experience unusual? No or it's common to try out a few pair of > lens to find the right one? Depends on the skills of your fitter. > - how many trials is considered "normal" during the fitting process? Depends on the difficulty of your prescription and what you want to be fixed. > ps: The lens that I am trying are ProClear toric. An excellent lens. Jan (normally Dutch spoken) will schreef: > I am in my early 40's and starting to try contact lens. > My nearsighedness is not too severe (-2.75 - sphere, both eyes) but I > have astigmatism. I believe it is -1.75 (OD), and -1.25 (OS)... Can > someone enlighten me about the meaning of "OD" and "OS"? I think they > are related to "left" and "right" eyes?? OD = Oculi Dexter meaning the eye(Oculi) to the right(Dexter). OS = Oculi Sinistre meaning the eye to the left. > I have tried my 1st pair of contact lens and it seems to be > unacceptable at work (indoors) - particularly hard to read > documents/texts and computer screen. Myopic people at your age and changing from glasses, like your prescription, to contactlenses don't have the comfort of the accomodation help provived when wearing glasses. Normally this should be told before you are fitted. I also find my vision clearer > outdoors (sunny for the entire week).. I see my optometrist today for a > 2nd time and he has given me a 2nd pair of contacts to try out. [quoted text clipped - 3 lines] > indoors (shopping mall, or home), then it's much harder to read text or > computer screen (unfocused images of text). Has to do with the pupildiameter, the smaller the diameter the more depth of (sharp)field (like in photography with aperture) Outside the light intensity is higher and therefore the pupil has a smaller diameter. The same insides when you switch on the lamp. > My questions are: > - is my experience unusual? No or it's common to try out a few pair of > lens to find the right one? Depends on the skills of your fitter. > - how many trials is considered "normal" during the fitting process? Depends on the difficulty of your prescription and what you want to be fixed. > ps: The lens that I am trying are ProClear toric. An excellent lens. Jan (normally Dutch spoken) |
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