Different near addition!!!

**Soph** · 05-31-2016, 04:41 PM

Hi!

Today i did a peculiar eye exam to a 49 y.o female.
She only used prescribed reading glasses which broke (i didn't get to see them).
Patient knew she wasn't seeing very well far away also.

Uncorrected distance visual acuity:

OD: 0,2
OS: 0,4

Prescription:

OD +3,00Dp/-0,75*90 (VA 1,0)
OS +1,75Dp/-0,25*20 (VA 1,0)

Her near power is what i found strange. OD: +1,50Dp OS: +2,25Dp. I have never done an eye exam where the ADD powers were so different!
Is this normal or did i miss something?

Thanks

**wmcdonald** · 05-31-2016, 06:50 PM

Over-minused OS?

**Chris Ryser** · 05-31-2016, 10:53 PM

Originally Posted by Soph

Is this normal or did i miss something?

Thanks

.................both of my eyes have the same add, however if I need a perfect suite made to measure, my left arm is 1/2 inch shorter than the other side.

**drk** · 06-01-2016, 01:41 PM

Overplussed OD?

Both!?

**wmcdonald** · 06-01-2016, 01:49 PM

Since accommodation is usually equal and bilateral, my guess was that at 49 a +1.50 add is about where it needs to be, and that the OS was over-minused. By adding back the +0.75 to the OS it would bring it up to +2.50, with a +1.50 add. But as you are aware, there is not sufficient information to make any real determination here......only a best guess. Too many variables here to make anything beyond that.