Most vision plans will cover routine comprehensive eye exams to check the  general health of the eye as well as to provide a prescription for either glasses or contact lenses.  Most plans also provide either an allowance or contribute towards the purchase of frame and lens options. 

Medical eye conditions can range from pink eye to the evaluation of patients with diabetes or high blood pressure.  Medical exams usually have a co-pay as well as a deductible that first must be met.  Special testing such as photos or visual fields may be required to properly diagnose or just monitor medical eye conditions.