Clinical Research Directory

Inclusion Criteria: (1) age ≥18 years,(2) able and willing to comply with the treatment schedule. Exclusion Criteria: 1. The eyes cannot fixate on the fixation lamp (such as children, nystagmus diseases, severe low vision, inattention, etc.) and cannot act according to the user's instructions and sit in the front of the equipment (the forehead or lower song is injured so that it cannot be supported on the forehead / lower song bracket) 2. The eyes are cloudy with optical media (such as corneal opacity, central corneal scar, mature cataract, posterior chamber bag opacity, vitreous hemorrhage, etc.). 3. The eyelid is completely closed or too small (drooping, relaxation) resulting in complete or partial occlusion of the cornea 4. Just after contact measurement or examination, use a corneal local anesthesia solution. (IOL Master 700 should avoid using local anesthetic before all contact examinations) 5. Tear film deformation (lack of specular reflection of the cornea during corneal curvature measurement), the severity of grade IV dry eye, and whether eye drops were used 24 hours before the examination. 6. Any corneal lesions (corneal irregularity, corneal scar or corrosive burning, severe irregular astigmatism of cornea) 7. Fundus lesions (changes in the anatomical morphology of retinal macular fovea during axial length measurement, such as retinal detachment, edema, ulcer, etc.) 8. Patients with ocular trauma, surgery, and excessive photosensitivity, such as photodynamic therapy (PDT), were excluded. 9. using eye drops (0.1% Sodium hyaluronate) allergic patients