Comparison of visual quality between eyes implanted with monofocal and bifocal intraocular lenses with prior myopic LASIK/PRK

Comparison of visual quality between eyes implanted with multifocal and monofocal intraocular lenses with prior corneal refractive surgery

Status

Recruiting

Phases

Early Phase 1

Study type

Observational

Source

ChiCTR

Registry ID

ChiCTR2300069984

Enrollment

Unknown

Registered

2023-03-30

Start date

2022-10-13

Completion date

Unknown

Last updated

2023-05-29

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

Conditions

cataract

Interventions

Monofocal IOL group:N/A

Bifocal IOL group:N/A

Eligibility

Sex/Gender

All

Age

31 Years to 59 Years

Inclusion criteria

Inclusion criteria: 1) Patients with prior myopic LASIK/PRK; 2) Corneal astigmatism = 36D; the size of the effective optical zone (EOZ) >= 5mm; no suspected corneal ectasia or eccentric laser ablation; 3) Postoperative uncorrected distance visual acuity (UDVA) for the enrolled eye was 20/32 or better; 4) Patients with no dry eye disease, corneal epithelial basement membrane dystrophy and contraindication for the surgery.

Exclusion criteria

Exclusion criteria: Patients with chronic or recurrent uveitis, glaucoma, diabetic retinopathy, and severe mental and psychological diseases were excluded.

Design outcomes

Primary

Measure	Time frame
Quality of Vision Questionnaire;ocular scatter index, modulation transfer function cutoff, Strehl ratio;corneal and ocular spherical aberration,coma and total higher-order aberration;visual acuity;	—

Secondary

Measure	Time frame
refractive prediction error;	—

Countries

China

Contacts

Public ContactLiu Chunlei

Qingdao Eye Hospital of Shandong First Medical University

376390618@qq.com+86 187 6970 8596

Outcome results

None listed

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