PubMed · 9109067
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P Wyzinski, L W O'Dell. Hexagonal keratotomy.. https://doi.org/10.3928/1081-597x-19970301-07
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PURPOSE: To describe an efficient technique for suturing a Landers wide-field temporary keratoprosthesis for intraocular surgery in an eye with an opaque cornea. METHODS: Two sutures were preplaced at partial thickness into corneal stroma parallel to the corneoscleral limbus. Suture ends were placed through corresponding holes in the keratoprosthesis and tied. RESULTS: The temporary keratoprosthesis was held firmly in place with two sutures and provided clear visualization for extensive intraocular surgery. CONCLUSION: The preplaced two-suture technique for securing a temporary keratoprosthesis to the globe decreased the time that the globe was open.
PURPOSE: To determine whether the viscosity of eyedrops affects the distribution of the precorneal tear film. METHODS: Using a differential pachymetry map, we obtained tear film thickness in healthy volunteers before and after the instillation of nonviscous, aqueous artificial tears and a 0.3% sodium hyaluronate solution. RESULTS: The instillation of aqueous artificial tears disclosed a significant (P < .05) thickening of the superior corneal tear film compared with the inferior corneal tear film. The increase in thickness by 0.3% sodium hyaluronate solution was uniform, with no differences between the superior and inferior cornea. CONCLUSIONS: Aqueous artificial tears caused an uneven thickening of the precorneal tear film, with most of the thickening observed at the superior cornea. Lower sections of the cornea may benefit less from the instillation of nonviscous solutions.
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