What does a change in my eye prescription mean?

1 answer | Last updated: Oct 02, 2009
64px-hh6b80fd52d1
Q
An anonymous caregiver asked...
I had an eye exam and my contact lens were -3.50 and now are -3.00. What does this mean?
 

Answers
Caring.com User - Jennifer Serafin, N.P.
Caring.com Expert
Send a Hug or Prayer
Send a Hug or Prayer
A
Jennifer Serafin, N.P. is a registered nurse and geriatric nurse practitioner at the Jewish Homes for the Aged in San Francisco.
50% helpful

Although I am not an optometrist, I will try to make my explanation of this as simple as I can. First, lets go over the plus/minus before the number. Plus See also:
How can I persuade my dad to be honest with others about his vision problem?
means the glasses magnify, minus means they minimize. The numbers are called "sphere powers", which indicate the amount of focal length your contact lens will correct for. The difference from the -3.50 to -3.00 means the the distance for you to be able to see things clearly has changed from 1/3.5 meters to 1/3 meter. Anything farther than 1/3 of a meter would be blurry to you.

If you have more questions, I suggest you speak with your optometrist.

 

 
Ask a question Ask a question | Add an answer Add an answer