Small incision corneal lenticule extraction for myopia and myopic anisometropia

Evaluation of visual outcomes and binocular vision functions following small incision corneal lenticule extraction for myopia and myopic anisometropia

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

ISRCTN

Registry ID

ISRCTN26161084

Enrollment

Registered

2024-01-10

Start date

2015-09-01

Completion date

Unknown

Last updated

2024-01-22

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

Conditions

Myopic anisometropia Eye Diseases

Interventions

The ocular parameters used for characterizing binocular functions include: divergence and convergence amplitudes (near and distance), stereoacuity (near and distance), and near and distance horizontal

the graded circles are used to quantify stereopsis. Heterophoria measurements are obtained using the von Graefe technique: a 6 ? base-up dissociating prism is placed in front of the right eye, and hor

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Aged 18 to 30 years, stable myopia for =1 year 2. Corrected distance visual acuity (CDVA) of 20/20 or better 3. SE of -1.00 to -10.00 diopters (D) with or without myopic astigmatism (< -1.5D) 4. Qualified for laser refractive surgery for myopia (normal ocular anterior segment examination except for refractive error)

Exclusion criteria

Exclusion criteria: 1. Patients with any ocular surface diseases 2. History of corneal or intraocular surgery, ocular trauma, keratoconus, cataract, vascular, or autoimmune diseases

Design outcomes

Primary

Measure	Time frame
1. Divergence and convergence amplitudes (near and distance) are measured using Risley rotary prisms preoperatively and at 1 week, 1, 3 and 6 months after surgery 2. Distance stereoacuity is measured using the stereotest booklet (Distance Randot Stereotest, Stereo Opticals Co., Inc., range: 400-60 arcsec) preoperatively and at 1 week, 1, 3 and 6 months after surgery 3. Near stereoacuity is measured using the Randot circles test (Stereo Randot Test 2 for Adults, Stereo Optical, ranged: 400-12.5arcsec) preoperatively and at 1 week, 1, 3 and 6 months after surgery 4. Heterophoria measurements are measured using Risley rotary prism preoperatively and at 1 week, 1, 3 and 6 months after surgery	—

Measure

Time frame

1. Divergence and convergence amplitudes (near and distance) are measured using Risley rotary prisms preoperatively and at 1 week, 1, 3 and 6 months after surgery 2. Distance stereoacuity is measured using the stereotest booklet (Distance Randot Stereotest, Stereo Opticals Co., Inc., range: 400-60 arcsec) preoperatively and at 1 week, 1, 3 and 6 months after surgery 3. Near stereoacuity is measured using the Randot circles test (Stereo Randot Test 2 for Adults, Stereo Optical, ranged: 400-12.5arcsec) preoperatively and at 1 week, 1, 3 and 6 months after surgery 4. Heterophoria measurements are measured using Risley rotary prism preoperatively and at 1 week, 1, 3 and 6 months after surgery

—

Secondary

Measure	Time frame
Monocular uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) are measured using Snellen charts preoperatively and at 1 week,1,3 and 6 months after surgery	—

Countries

China

Contacts

Public ContactShengbei Weng

1023816828@qq.com+86 (0)13711552618

Outcome results

None listed

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