[Availability of TPD ophthalmic solution (mixture of Mydrin-P solution, Neosynesin Kowa solution, and Diclod solution) in regard to the corneal barrier function--clinical evaluation for vitrectomy in patients with diabetic retinopathy].

PURPOSE: We made TPD ophthalmic solution by combining Tropicamide solution(Mydrin-P: T), Phenylephrine Hydrochloride(Neosynesin Kowa solution: P) and Diclofenac Sodium(Diclod solution: D), and evaluated its efficiency in terms of corneal epithelial damage in patients with diabetic retinopathy. SUBJECTS AND METHODS: Five patients(10 eyes) who were to undergo vitrectomy were enrolled in this study. They each received T, P, and D 6 times and TPD solution in the same way. Before and after the instillation, superficial punctate keratopathy (SPK) was evaluated and corneal epithelial permeability was determined by anterior fluorophotometry. RESULTS: After the instillation of T, P, and D, corneal damage increased in all eyes. After the instillation of TPD, three eyes showed only one grade change up in AD(A: area, D: density) classification of SPK. The fluorescein uptake change between pre- and post-instillation was 457.5 +/- 468.8 (mean +/- standard deviation) ng/ml with T, P, and D and 100.5 +/- 235.6 ng/ml with TPD(p < 0.01). CONCLUSION: TPD solution decreases both corneal epithelium damage and barrier function change of corneal epithelium.