If you mean as an optometric assistant, then i think so.
People tend to only goto places like Lenscrafters for quick Rx's. I never interned at commercial but I did at private and hospital.
Private is generally the same, mainly pushing out Rx's and trying to sell glasses, with some occasional problems. But from my personal experiences, the majority of people coming in are just for Comprehensive examninations, contact lens follow ups.
In a hospital, you will get alot more Medicare or Medical (I forget which one it is, that is the one for seniors) patients. You will generally see alot more cases of developing cataracts, dry eyes, diabetes, AMD.
Also, hospitals have equipment (i.e. taking stereo photos, OCT) that not all private practices/commercial practices have because they are usually interwound with the ophthalmology deptarment in hospitals.
I don't know if it will help your chances of getting into a school, but it is definitely a good learning experience (remember to ask the docs lotsa questions). Best of luck to you.