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serious problem with vision

johnstoner

Ben Franklin on Hashish
7+ Year Member
15+ Year Member
Oct 15, 2002
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under the sea
Hi everyone

I recently had a refraction done by a friend and my correction went from

Sph -4.5 Cyl -1.75 axis 170 to

sph -9.5 cyl -3.0 axis 100

in 18 months. I feel really bad about this and I'm wondering what might have caused this. I can still see fine in my glasses albeit its a little blurry...but i didn't expect this much change

there are times when I don't take off my contacts for a week at a time...so i'm thinking I might have damaged my corneas

do you think its normal? or a retinal problem? corneal?


I'm wondering what the possibilities are...
 
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Richard_Hom

Senior Member
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15+ Year Member
May 29, 2003
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San Mateo, CA
Originally posted by johnstoner
Hi everyone

I recently had a refraction done by a friend and my correction went from

Sph -4.5 Cyl -1.75 axis 170 to

sph -9.5 cyl -3.0 axis 100

in 18 months. I feel really bad about this and I'm wondering what might have caused this. I can still see fine in my glasses albeit its a little blurry...but i didn't expect this much change

there are times when I don't take off my contacts for a week at a time...so i'm thinking I might have damaged my corneas

do you think its normal? or a retinal problem? corneal?


I'm wondering what the possibilities are...

1. contact lens over wear (EW???)

2. over minussed refraction, recheck with cycloplegic refraction

Richard_Hom
 

GlaucomaMD

GlaucomaMD
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Aug 4, 2003
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Houston, Texas
www.bayloreye.org
Common things being common...

I agree with Richard_Hom

Rule out over-minus refraction... Very common in young people when they are not having cycloplegic refraction...

You can also check by using red-green line on the visual acuity chart to confirm this.
You should see the letters within the red and the green box with approximately same clarity.
 

johnstoner

Ben Franklin on Hashish
7+ Year Member
15+ Year Member
Oct 15, 2002
382
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41
under the sea
first he used an auto refractor and then tweaked it manually...but overall it was at that prescription. Hmmm...i don't know.

worry is that my gradma on my dad's side was blind, and my oldest uncle is in the process of going blind. I'm not sure what it is...could be glaucoma or macular degeneration...who knows.
 

Richard_Hom

Senior Member
7+ Year Member
15+ Year Member
May 29, 2003
518
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0
San Mateo, CA
Originally posted by johnstoner
first he used an auto refractor and then tweaked it manually...but overall it was at that prescription. Hmmm...i don't know..."

Dear johnstoner,

Autorefractors are notorious for over-estimating the refractive errors of myopes. This is especially true if the subjective refraction was done with the autorefractor.

The autorefractor can be used more carefully in your case if you get cycopleged with 1 drop of cycolpentolate 1% each eye followed by another in 10min
Richard_Hom
 
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