What change in eyeglass prescription is significant i.e should I get new lenses? - AVS Forum
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post #1 of 7 Old 07-24-2012, 09:17 AM - Thread Starter
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I recently had a vision check and what is a relatively light, under 2 diopter, prescription has changed 0.25 for one eye. Anyone know if it is enough to make significant improvement and thus make it worthwhile to get new lenses?

Thanks,
Dave
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post #2 of 7 Old 07-24-2012, 10:02 AM
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Dave,
Which eye had the change? Is it your dominant eye? Nearsighted or farsighted? What shape are your glasses in?
In general, I would tell a patient that it's not enough of a change to warrant changing glasses.

Jeff
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post #3 of 7 Old 07-24-2012, 08:24 PM
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A 0.25 change is usually not enough to warrant new lenses
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post #4 of 7 Old 07-25-2012, 03:45 AM - Thread Starter
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Thanks guys. I p.m..'ed Jeff with details since thread was moving away from generalized advice.
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post #5 of 7 Old 07-25-2012, 06:36 AM
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If you're talking nearsightedness, if you're under corrected by a 1/4 diopter your far point is at 4 meters, the additional correction would push you out to infinity. It may be noticeable at night. It depends on how high your correction is to begin with. A 1/4 D change would be more noticeable to someone who's only a -.25 to begin with vs someone who's already a -12.
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post #6 of 7 Old 07-25-2012, 02:13 PM - Thread Starter
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Quote:
Originally Posted by saeyedoc View Post

If you're talking nearsightedness, if you're under corrected by a 1/4 diopter your far point is at 4 meters, the additional correction would push you out to infinity. It may be noticeable at night. It depends on how high your correction is to begin with. A 1/4 D change would be more noticeable to someone who's only a -.25 to begin with vs someone who's already a -12.

Dominant eye od, nearsighted. Glasses in good shape verilux physic enhanced.

old od S -1.00 Cyl -0.75 Axis 70 new -1.25/-0.50 axis 64
os -.05/sph new -.05/-.025/085
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post #7 of 7 Old 07-25-2012, 08:21 PM
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Quote:
Originally Posted by DaveN View Post

Dominant eye od, nearsighted. Glasses in good shape verilux physic enhanced.
old od S -1.00 Cyl -0.75 Axis 70 new -1.25/-0.50 axis 64
os -.05/sph new -.05/-.025/085
Negligible change in spherical equivalent, you have to take into account the change in astigmatism. Unlikely to be noticeable.
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