You might think a trip to the eye doctor is only warranted if you're having trouble seeing, but that's not necessarily the case. "A patient should not wait until they are diagnosed with an eye disorder to see an eye doctor," Dr. Reed told POPSUGAR. Instead, she recommends making an appointment every one to two years to ensure that your eye health is consistent, as vision changes can be subtle and happen over time. If you have a more serious condition like cataracts or glaucoma, appointments will be needed more often.