Application of Q value guided non-linear aspherical monocular LASIK for presbyopia

Status

Recruiting

Phases

Early Phase 1

Study type

Interventional

Source

ChiCTR

Registry ID

ChiCTR1900026562

Enrollment

Unknown

Registered

2019-10-14

Start date

2018-01-01

Completion date

Unknown

Last updated

2019-10-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

laser-assisted in situ keratomileusis

Interventions

Case series:Q-moderating operation

Eligibility

Sex/Gender

All

Age

18 Years to 50 Years

Inclusion criteria

Inclusion criteria: 1. Volunteered to take the surgery; 2. stopped wearing soft contact lenses for at least 15 daysor oxygen-permeable hard contact lens for over 3 months; 3. Informed consent; 4. Satisfied follow-up.

Exclusion criteria

Exclusion criteria: 1. subjects with keratoconus; 2. subjects with history of previous ocular surgery or combined systemic disease; 3. subjects with corneal scars or corneal lesions.

Design outcomes

Primary

Measure	Time frame
coma;Q value;corneal index of surface variance (ISV);corneal index of vertical asymmetry;visual acuity;	—

Secondary

Measure	Time frame
intraocular pressure;Corneal thickness;	—

Countries

China

Contacts

Public ContactLin Ying

Liuzhou Worker's Hospital

linying0320@sina.com+86 13507726874

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026