Over time, the tendon of the eyelid stretches. This causes the eyelid, itself, to become lax and not appose against the eye at the optimal position. When an eyelid is lax, it can lead to tearing, ectropion, entropion, or lid retraction--all of which, in turn, can lead to discomfort and blurred vision. Lid laxity can be repaired by a surgery to tighten or shorten the eyelid.