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Comment on: Transient effect of suction on retinal neuro-vasculature in myopic patients after small-incision lenticule extraction

Roy, Abhijit Sinha PhD

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Journal of Cataract & Refractive Surgery: May 2021 - Volume 47 - Issue 5 - p 683
doi: 10.1097/j.jcrs.0000000000000077
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In the study by Liu et al.,1 they evaluated retinal tomography and vascular features after small-incision lenticule extraction. The postoperative evaluation was performed at day 1 and day 7. On reading the methods, it was clear that no adjustment to the axial and lateral dimensions was performed as a result of the change in the axial length after small-incision lenticule extraction. Axial length changes after refractive surgery because of the change in the thickness of the cornea.2,3 Refractive surgery caused a change in the magnification of the optical coherence images acquired postoperatively. It was surprising that neither the authors of the study were aware of this or the reviewers raised this concern. This brings into question the accuracy of all the results presented in this study.1

REFERENCES

1. Liu J, Tonk RS, Huang AH, Han E, Karp CL, Zheng M, Zou H, Zheng Y, Luo W, Sha Z, Liu Z. Transient effect of suction on retinal neuro-vasculature in myopic patients after small-incision lenticule extraction. J Cataract Refract Surg 2020;46:250–259
2. Hirasawa K, Shoji N, Yoshii Y, Haraguchi S. Comparison of Kang's and Littmann's methods of correction for ocular magnification in circumpapillary retinal nerve fiber layer measurement. Invest Ophthalmol Vis Sci 2014;55:8353–8358
3. Aykut V, Öner V, Taş M, Işcan Y, Ağaçhan A. Influence of axial length on peripapillary retinal nerve fiber layer thickness in children: a study by RTVue spectral-domain optical coherence tomography. Curr Eye Res 2013;38:1241–1247
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