Effect of Upper Eyelid Surgeries on Corneal Characteristics

The goal of this prospective observational study is to learn about the impact of conventional eyelid correction surgery on the eye's health and function in ptosis and eyelid retraction patient. The main questions it aims to answer are: •Changes in corneal topography, higher-order corneal aberrations, corneal biomechanical characteristics, and corneal epithelial thickness before and after the surgeryInfluence of corneal refraction examinations , vision change, and tear film function after the surgeryFifty participants will undergo conventional eyelid correction surgery by the same ophthalmologist (YH Wei) and non-invasive examinations before and after the surgery. The patient will be separate to 2 groups, including 30 with correction for ptosis and 20 with correction for eyelid retraction. The research will collect information of the operated eye and fellow eye, and the data will be compared between operated and fellow eye and with the other group.

Inclusion Criteria:Group 1:marginal reflex distance 1 (MRD1) ≦ 2-2.5 mmlevator muscle function (LMF) ≧ 8 mmGroup 2:with upper scleral showExclusion Criteria:pregnancyprevious corneal surgerywith corneal scarpterygiumkeratoconussignificant ocular surface diseasewearing rigid contact lens