Effects of postural changes in eye cyclotorsion and pupil centroid shifts on corneal refractive surgery

Authors: Zhu Qing,  Wang Yan
DOI: 10.3760/cma.j.cn115989-20210310-00157
Published 2021-06-10
Cite asChin J Exp Ophthalmol, 2021, 39(6): 572-576.

Abstract

The main purpose of corneal refractive surgery is not only to improve vision, but also to improve visual quality, which is a higher level of visual ability except vision.At present, most corneal refractive surgeries take the pupil center as the center of examination and treatment, since changes in body position may result in pupil centroid shifts and eye cyclotorsion and postoperative visual quality can be affected by undercorrected astigmatism, induced astigmatism and increased high order aberration that results from eccentric cutting occurring during corneal refractive surgery.The measurement of centroid shifts and eyeball rotation that can be attributed to the change of body position guiding the design of surgery is of great significance to enhance the accuracy of pupil center positioning, improve the safety of surgery and promote the postoperative visual quality.In this article, the relevant literature on the measurement methods of the pupil centroid shifts and ocular cyclotorsion, pupil centroid shifts and ocular cyclotorsion measured by iris recognition technology in response to changes in body position, and the effects of posture-related pupil centroid shifts and ocular cyclotorsion during refractive surgery on postoperative visual quality (postoperative astigmatism, aberration, and modulation transfer function) were reviewed.

Key words:

Corneal refractive surgery; Ocular cyclotorsion; Pupil centroid shift; Astigmatism; Aberration

Contributor Information

Zhu Qing

Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Hospital, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China

Wang Yan

Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Hospital, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China

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Updated: June 24, 2021 — 8:14 am