PURPOSE To describe the impact of lockdown and unlock phases of the COVID-19 pandemic on keratoplasty trends at a tertiary eye care center in India. METHODS This cross-sectional hospital-based study included 6,277 patients presenting between March 25, 2017 and March 31, 2021. The data of the patients who underwent keratoplasty during the lockdown and unlock phases were compared with the respective periods in the previous three years before COVID-19. RESULTS During the year one of pandemic, there was a 29.46% decline in the total number of keratoplasty performed at the institute compared to previous year's annual numbers. The patients undergoing keratoplasty decreased by 90.28% (28/288) of pre-COVID-19 volumes during the lockdown phase. This was mainly because of a 40.6% reduction in the proportion of patients requiring interstate travel. There was complete recovery in the number of patients undergoing keratoplasty to 129.27% (184/142) of pre-COVID-19 volumes by March 2021. This gradual incremental trend was seen across all types of keratoplasty in Descemet stripping endothelial keratoplasty (135.29%), penetrating keratoplasty (117.6%), therapeutic keratoplasty (122.22%), anterior lamellar keratoplasty (150%), and Descemet membrane endothelial keratoplasty (141.18%) by March 2021 with the gradual ease of lockdown regulations. The eye bank affiliated to the institute saw a 55.44% decline in donor cornea collection and an increase in utilization rate from 58.12% in previous years to 83.78% in year one of the pandemic. The overall eye bank donor cornea collection recovered to 86.96% (627/721) and tissue utilization increased by 109.99% (455/414) by March 2021. CONCLUSION The first year of the COVID-19 pandemic saw an overall reduction of 29.46% of the patients undergoing keratoplasty at the institute. There was a gradual and incremental increase in all types of keratoplasty in the unlock phase, which surpassed the preceding years' monthly numbers in February and March.

中文翻译：

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印度 COVID-19 大流行的第一年：锁定和解锁对三级眼科中心角膜移植术趋势的影响。

目的 描述 COVID-19 大流行的锁定和解锁阶段对印度三级眼科护理中心角膜移植趋势的影响。方2019冠状病毒病。结果 在大流行的第一年，与前一年的年度数字相比，该研究所进行的角膜移植术总数下降了 29.46%。在锁定阶段，接受角膜移植术的患者体积比 COVID-19 前体积减少了 90.28% (28/288)。这主要是因为需要州际旅行的患者比例减少了 40.6%。到 2021 年 3 月，接受角膜移植术的患者数量完全恢复到 COVID-19 前体积的 129.27% (184/142)。这种逐渐增加的趋势在后弹力层剥离内皮角膜移植术 (135.29%) 中的所有类型角膜移植术中均可见、穿透性角膜移植术 (117.6%)、治疗性角膜移植术 (122.22%)、前板层角膜移植术 (150%) 和后弹力层内皮角膜移植术 (141.18%) 到 2021 年 3 月随着封锁规定的逐步放松。该研究所附属眼库的供体角膜收集量下降了 55.44%，利用率从往年的 58.12% 上升到疫情第一年的 83.78%。到 2021 年 3 月，眼库总体供体角膜收集率恢复到 86.96% (627/721)，组织利用率增加了 109.99% (455/414)。结论 在 COVID-19 大流行的第一年，该研究所接受角膜移植术的患者总体减少了 29.46%。开锁期各类角膜移植均呈渐进递增趋势，超过往年2月和3月的月度数字。