Comparing Preschool-Aged Refractive Measurements and Amblyopia Risks Using the 2WIN-S Portable Refractor with Vision Screening by Cycloplegic Refraction in Bangkok

Comparing Preschool-Aged Refractive Measurements and Amblyopia Risks Using the 2WIN-S Portable Refractor with Vision Screening by Cycloplegic Refraction in Bangkok

The goal of this diagnostic test is to compare the results of refraction and amblyopia risks between using 2WIN-S portable refractor and cycloplegic refraction in pre-school age.

All participants will be tested by 2WIN-S portable refractor.

Inclusion Criteria:

• corrected visual acuity 0.1 logMAR (Snellen 20/25) or better
• Age 3-6 years old who studies in the kindergarten school that joins the study
• Parents sign informed consent form about allowing their child to join the study

Exclusion Criteria:

• other eye conditions causing visual and 2WIN-S portable refractor working disturbance such as media opacity, history of ocular surgery, strabismus, etc.