What change in eyeglass prescription is significant i.e should I get new lenses? - AVS Forum

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Ultra Hi-End HT Gear ($20,000+)

DaveN's Avatar DaveN
10:17 AM Liked: 10
post #1 of 7
07-24-2012 | Posts: 1,818
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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
jstrossner's Avatar jstrossner
11:02 AM Liked: 10
post #2 of 7
07-24-2012 | Posts: 157
Joined: Dec 2000
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
Perfectionist2's Avatar Perfectionist2
09:24 PM Liked: 18
post #3 of 7
07-24-2012 | Posts: 453
Joined: Feb 2005
A 0.25 change is usually not enough to warrant new lenses
DaveN's Avatar DaveN
04:45 AM Liked: 10
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07-25-2012 | Posts: 1,818
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Thanks guys. I p.m..'ed Jeff with details since thread was moving away from generalized advice.
saeyedoc's Avatar saeyedoc
07:36 AM Liked: 28
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07-25-2012 | Posts: 969
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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.
DaveN's Avatar DaveN
03:13 PM Liked: 10
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07-25-2012 | Posts: 1,818
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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
saeyedoc's Avatar saeyedoc
09:21 PM Liked: 28
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07-25-2012 | Posts: 969
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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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