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: • 1. Changes in corneal topography, higher-order corneal aberrations, corneal biomechanical characteristics, and corneal epithelial thickness before and after the surgery 2. Influence of corneal refraction examinations , vision change, and tear film function after the surgery Fifty 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.
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Change from best corrected visual acuity at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from intraocular pressure at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from eyeball axial length at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from slit lamp examination at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from margin to reflex distance (MRD) at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from levator muscle function (LMF) at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from lagophthalmos at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from basal tear volume at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from ocular surface disease index (OSDI) at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from tear break up time at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from corneal biomechanical characteristics at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from corneal topography at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from higher-order corneal aberrations at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3
Change from corneal epithelial thickness at 3 months after the surgery
Timeframe: Baseline, Month 1, Month 3