1. Articles from Cornea


  2. 1-7 of 7
    1. Use of Anterior Segment Optical Coherence Tomography to Assess Secondary Glaucoma After Penetrating Keratoplasty.

      Purpose: To describe the use of anterior segment optical coherence tomography (AS-OCT) in the evaluation of a patient with raised intraocular pressures after penetrating keratoplasty. Methods: A 52-year-old Indian male with bilateral keratoconus underwent multiple penetrating keratoplasties because of repeated episodes of endothelial rejection and graft failure. He also had secondary glaucoma bilaterally for which he underwent bilateral posterior implantation of glaucoma drainage device. During the early postoperative period after a repeat right penetrating keratoplasty with anterior synechiolysis, his right intraocular pressure was persistently raised. The AS-OCT was used to aid in the assessment of the patient. Results: The AS-OCT ...

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    2. Agreement Between Stratus and Visante Optical Coherence Tomography Systems in Tear Meniscus Measurements.

      Aim: To compare the tear meniscus height (TMH) measurements provided by the Stratus and Visante optical coherence tomography systems. Methods: A cross-section image of the lower tear meniscus was captured with both instruments in 26 volunteers. An external application was used to manually measure the TMH as imaged by the Stratus; measurements by the Visante were analyzed by the internal software. Only 1 eye for each subject was considered for statistical analysis. Results: The mean (±SD) TMH was higher when measured by the Visante (0.28 ± 0.12 mm) compared with the Stratus (0.23 ± 0.07 mm, P = 0 ...
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    3. Optical Coherence Tomography of Descemet Membrane Separation by the Big Bubble Technique

      Purpose: To image Descemet membrane separation by the big bubble technique in human corneas by using anterior segment optical coherence tomography (OCT). Methods: Five human corneoscleral rims were placed on an artificial anterior chamber and partially trephinated. A 23-gauge needle was inserted into the stroma under slit-lamp control and air was injected. The procedure was continuously imaged by anterior segment OCT. Results: In all corneoscleral rims, a big bubble was created. The spread of air seemed to follow the interlamellar spaces without crossing lamellae. It involved mainly the inner layers of the stroma while sparing the outer 212 +/- 41 [mu ...
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    4. In Situ Ultrahigh-resolution Optical Coherence Tomography Characterization of Eye Bank Corneal Tissue Processed for Lamellar Keratoplasty.

      Purpose: To use optical coherence tomography (OCT) as a noninvasive tool to perform in situ characterization of eye bank corneal tissue processed for lamellar keratoplasty. Methods: A custom-built ultrahigh-resolution OCT (UHR-OCT) was used to characterize donor corneal tissue that had been processed for lamellar keratoplasty. Twenty-seven donor corneas were analyzed. Four donor corneas were used as controls, whereas the rest were processed into donor corneal buttons for lamellar transplantation by using hand dissection, a microkeratome, or a femtosecond laser. UHR-OCT was also used to noninvasively characterize and monitor the viable corneal tissue immersed in storage medium over 3 weeks. Results ...

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    1-7 of 7
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