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

yuhao shao113 enrolled

Overview

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).

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.

Study Type

OBSERVATIONAL

Enrollment

113

Conditions

Visual Quality Axial Length High Myopia

Interventions

This study does not involve any interventionsOTHER

This study does not involve any interventions

Eligibility

Sex: ALLMin age: 18 YearsMax age: 40 YearsHealthy volunteers:

Medical Language ↔ Plain English

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.

Locations (1)

Shanghai Tenth People's Hospital

Shanghai, Shanghai Municipality, China

Outcomes

Primary Outcomes

Subjective visual quality

The quality of vision (QOV) questionnaire consists of (i) symptom frequency, (ii) severity, and (iii) bothersomeness for (a) glare, (b) halo, (c) starbursts, (d) hazy vision, (e) blurred vision, (f) distortion, (g) multiple images, (h) visual fluctuations, (i) difficulty focusing, and (j) difficulty judging distance or depth perception. Respondents use a scale of 0 to 3, where zero (0) denotes "none," one (1) "a little," two (2) "quite a bit," and three (3) "very much." Furthermore, on a scale from 0 to 10, patients were asked to provide Likert ratings for "daytime" and "nighttime" quality of vision (0 denoting the poorest vision, while 10 indicating the best vision)

Time frame: 12 months

Secondary Outcomes

Refractive results

The uncorrected distance visual acuity (UDVA, logMAR), corrected distance visual acuity (CDVA, logMAR), subjective refraction (Diopter), and intraocular pressure (mmHg) were evaluated prior to and 1 year after SMILE.

Time frame: 12 months

Data from ClinicalTrials.gov

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