Evaluating early-stage disk halo changes after small incision lenticule extraction.
Wuxiao Zhao1,2,3,4,5, Jing Zhao1,2,3,4, Zhe Zhang1,2,3,4
1Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China.
European Journal of Ophthalmology
|November 15, 2022
Summary
Early disk halo symptoms after small incision lenticule extraction (SMILE) resolve within three months. High myopia patients experience slower recovery than low-to-moderate myopia patients, with halo size linked to visual acuity and aberrations.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Visual Optics
Background:
- Small incision lenticule extraction (SMILE) is a popular refractive surgery for myopia.
- Understanding visual side effects like disk halos is crucial for patient outcomes.
Purpose of the Study:
- To evaluate early changes in disk halo phenomena after SMILE.
- To compare halo development and recovery in different myopia severities.
Main Methods:
- Prospective study of 70 myopic patients undergoing SMILE.
- Pre- and postoperative measurements included refraction, higher-order aberrations (HOAs), pupillometry, and halo assessment under varying light conditions.
Main Results:
- Halo radius peaked at 1 week post-SMILE in high myopia (HM) and low-to-moderate (LM) myopia groups, recovering by 3 months.
- LM myopia showed faster halo recovery compared to HM myopia.
- Halo radius correlated with refractive error, visual acuity, HOAs, and pupillary response in the LM group.
Conclusions:
- Disk halos are an early, transient visual disturbance after SMILE.
- Myopia severity influences halo recovery time, with HM patients recovering slower.
- Visual aberrations and pupillary dynamics are associated with halo symptoms.
