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Pupil response to tropicamide following corneal crosslinking

Abstract

Purpose

To evaluate the effect of corneal crosslinking (CXL) with ultraviolet A (UVA) irradiation on pupil response to tropicamide 0.5% instillation.

Methods

This prospective interventional study enrolled 17 patients (19 eyes) with progressive keratoconus who underwent CXL with UVA irradiation. Central corneal thickness (CCT) was evaluated with the use of anterior segment optical coherence tomography (Visante OCT 3.0). Pupil diameter was measured with the use of Colvard infrared pupillometer before the instillation of tropicamide 0.5% and after the instillation of tropicamide every 5 minutes for total duration of 30 minutes. Corneal epithelial integrity was examined with the use of fluorescein dye staining. Measurements were performed 1 day preoperatively and 1 month postoperatively, with emphasis on simulating the same light conditions regarding the pupil measurements.

Results

No intraoperative or postoperative complications were observed in any of the patients. Mean CCT decreased significantly (p<0.001) 1 month postoperatively. Mean postoperative pupil size did not change significantly at any time point compared to the mean preoperative measurements.

Conclusions

The CXL procedure seems not to impair effectiveness of topical drugs, using pupil size measurements after tropicamide 0.5% instillation.

Eur J Ophthalmol 2016; 26(5): 394 - 397

Article Type: ORIGINAL RESEARCH ARTICLE

DOI:10.5301/ejo.5000758

Authors

George D. Kymionis, Theodore A. Paraskevopoulos, Dimitrios A. Liakopoulos, Michael A. Grentzelos, Anna I. Kouroupaki, Konstantinos I. Tsoulnaras, Sophia I. Panagopoulou, Cosimo Mazzotta, Efstathios T. Detorakis

Article History

Disclosures

Financial support: No financial support was received for this submission.
Conflict of interest: None of the authors has conflict of interest with this submission.

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Authors

Affiliations

  • Vardinoyiannion Eye Institute of Crete (VEIC), Faculty of Medicine, University of Crete, Heraklion, Crete - Greece
  • Department of Medical, Surgical and Neurosciences, Siena University Hospital, Siena - Italy

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