6 doctors weighed in:

Sometimes I can't see well with glasses. Why?

6 doctors weighed in
Dr. David Kira
Ophthalmology
4 doctors agree

In brief: Maybe Presbyopia

Usually when glasses work some of the time but not at others it is due to presbyopia or difficulty with accommodation up close - this is usually solved with bifocals.
Other times, blurred vision may not have anything to do with glasses like dry eyes or blepharitis. Both of these have intermittent symptoms and can interfere with clear vision.

In brief: Maybe Presbyopia

Usually when glasses work some of the time but not at others it is due to presbyopia or difficulty with accommodation up close - this is usually solved with bifocals.
Other times, blurred vision may not have anything to do with glasses like dry eyes or blepharitis. Both of these have intermittent symptoms and can interfere with clear vision.
Dr. David Kira
Dr. David Kira
Thank
Dr. Alan Jackson
Addiction Medicine

In brief: Recheck the Rx

Have the eye care professional check the glass prescription, they may have been made wrong or too stong/too weak.

In brief: Recheck the Rx

Have the eye care professional check the glass prescription, they may have been made wrong or too stong/too weak.
Dr. Alan Jackson
Dr. Alan Jackson
Thank
Read more answers from doctors