Pre-operative examination items 1. Visual acuity examination: including naked eye distance visual acuity, near visual acuity and corrected visual acuity with glasses. 2. Optometry: including small pupil or dilated pupil computerized optometry, primary optometry 3. dominant eye test 4. binocular fusion function examination 5. slit lamp microscopy 6. slit lamp anterior lens examination 7. A ultrasonic corneal thickness measurement 8. corneal diameter measurement 9. pupil diameter measurement 10. corneal topography examination 11. intraocular pressure measurement 12. tear duct function examination 13. tear film rupture time measurement 14. Oculus Pentacam anterior segment analysis system examination