The Influence of Axial Length on Visual Quality Following SMILE Surgery in Patients with High Myopia

yuhao shao

Status: Completed

Conditions: Visual Quality; Axial Length; High Myopia

Treatments: Other: This study does not involve any interventions

Study type: Observational

Funder types: Other

Identifiers

NCT06898164

202240131 (Other Grant/Funding Number)

2025AL

YJXYS-B-009 (Other Grant/Funding Number)

Details and patient eligibility

About

This retrospective study aimed to investigate the subjective and objective visual outcomes following Small Incision Lenticule Extraction (SMILE) surgery in high myopic patients with varying axial lengths (AL).

Full description

The study enrolled 113 highly myopic patients (202 eyes) who underwent SMILE surgery at Shanghai's Tenth People's Hospital. Patients were classified into three groups based on the axial length before surgery: Group A (AL < 26 mm, 62 eyes), Group B (26 mm ≤ AL < 27 mm, 88 eyes), and Group C (AL ≥ 27 mm, 52 eyes). Preoperative and postoperative evaluations included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), equivalent spherical error(SE), and corneal high order aberration. Subjective visual quality was assessed using the Quality of Vision (QoV) questionnaire.

Enrollment: 113 patients

Sex: All

Ages: 18 to 40 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• manifest refraction spherical equivalent refraction exceeding -6.00D;
• stable myopia for a duration of at least 2 years;
• corrected distance visual acuity of at least 20/25;
• annual myopic spherical equivalent increment less than - 0.50 D.

Exclusion criteria

• a history of moderate to severe dry eye as well as any ocular or systemic disease.

Trial design

113 participants in 3 patient groups

AL < 26 mm

Description:

high myopic patients with axial lengths \< 26 mm

Treatment:

Other: This study does not involve any interventions

26 mm ≤ AL < 27 mm

Description:

high myopic patients with 26 mm ≤ axial lengths \< 27 mm

Treatment:

Other: This study does not involve any interventions

AL ≥ 27 mm

Description:

high myopic patients with axial lengths ≥ 27 mm

Treatment:

Other: This study does not involve any interventions