Ms. Naya Sterritt Profile

Naya Sterritt

at University of California Irvine

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Proceedings Article | 15 March 2023 Poster + Paper

Electrochemical clearing of rabbit cornea post-acidic/alkaline injury

Katelyn Dilley, Theodore Nguyen, Naya Sterritt, Ila Youssefi, Milind Vasudev, Clara Chao, Zhongping Chen, Michael Hill, Brian J. Wong

Proceedings Volume 12360, 123600O (2023) https://doi.org/10.1117/12.2650760

KEYWORDS: Cornea, Second harmonic generation, Optical coherence tomography, Corneal imaging, Collagen

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Chemical injuries to the cornea account for 11 to 22% of all ocular injuries. Acidic injuries are commonly due to sulfuric, hydrochloric, hydrofluoric, and battery acids, while basic injuries are commonly due to sodium hydroxide, chlorine bleach, and ammonia products. We have previously studied potential-driven electrochemical clearing (P-ECC) for alkaline injuries. In this study, we investigated the use of P-ECC on both acidic and alkaline injuries to determine its effect on restoring corneal transparency. Optical coherence tomography (OCT) was performed before and after P-ECC to determine adequate corneal clearing. Severity of chemical injury was measured through second harmonic generation (SHG) imaging. HCl or NaOH was applied to the corneas of New Zealand white rabbit globes. P-ECC was performed on opacified cornea while OCT imaging was simultaneously performed to evaluate depth resolved clarity. SHG imaging evaluated the structure of collagen before HCl or NaOH application and after P-ECC. Irrigation with water served as positive control. Native rabbit corneas were used as a negative control group. P-ECC induced clearing in the rabbit cornea, shown through OCT. Clearing occurred in regions where the working electrode made contact with the cornea. SHG imaging showed restoration of collagen fibril signal in P-ECC treated corneas compared to control. P-ECC is a potentially effective therapy for clearing acidic and alkaline corneal injuries. However, more ex-vivo experiments are required to determine the specific parameter for optimal clearing. In-vivo experiments are necessary to determine its potential for clinical use.

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