Can a smart device predict how a Child's eye grows?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Aged 6-17 years old, no gender limit; 2. Visiting the outpatient optometry room of Wuhan Children's Hospital, clinically required refraction examination; 3. Ability to cooperate in completing SmartEyes, Topcon KR-800, Topcon KR-1W examinations; 4. Able to complete reliable subjective refraction; 5. Subjects in the mydriasis subgroup should be those who need mydriasis/cycloplegia refraction for clinical diagnosis and treatment; 6. Those who participate in the second phase cohort must be able to complete the axial length measurement and be willing to return to complete the 3-month (and 6-month) follow-up as planned; 7. Guardians are fully informed and sign written informed consent; 8. Subject children accept research notifications based on their age and understanding ability, and express agreement or no objection to participating in the research. Exclusion Criteria: 1. Those unable to maintain stable fixation, unable to cooperate with desktop equipment for examination, or unable to perform reliable subjective refraction; 2. Obvious strabismus, nystagmus, severe amblyopia, or other conditions affecting the reliability of objective/subjective refraction; 3. Keratoconus, obviously irregular astigmatism, corneal scarring, corneal edema, or other corneal diseases that significantly affect refractive measurement; 4. Moderate to severe cataracts, obvious lens opacity, vitreous opacity, fundus diseases, and other conditions that may affect the refraction endpoint; 5. History of previous corneal refractive surgery or intraocular surgery; 6. Still wearing orthokeratology lenses, RGP, or other contact lenses on the day and determined by the investigator to affect measurement results; 7. Participants in the second phase cohort who are unable to complete follow-up, plan to undergo eye surgery in the short term, or have investigators who judge axial measurement results to be clearly unreliable will not be included in the cohort follow-up analysis; 8. Other circumstances where the investigator determines the participant is unsuitable for this study.