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      Topical dexamethasone-cyclodextrin microparticle eye drops for diabetic macular edema.

      Investigative ophthalmology & visual science
      Administration, Topical, Aged, Aged, 80 and over, Dexamethasone, administration & dosage, adverse effects, analogs & derivatives, Diabetic Retinopathy, diagnosis, drug therapy, physiopathology, Female, Glucocorticoids, Humans, Intraocular Pressure, physiology, Macula Lutea, pathology, Macular Edema, Male, Middle Aged, Ophthalmic Solutions, Pilot Projects, Tomography, Optical Coherence, Treatment Outcome, Visual Acuity, beta-Cyclodextrins

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          Abstract

          To test the safety and efficacy of topical 1.5% dexamethasone aqueous eye drops with cyclodextrin microparticles for diabetic macular edema (DME). Nineteen eyes of 19 consecutive patients with DME were administered dexamethasone-cyclodextrin eye drops three or six times a day for 4 weeks and then observed for 4 weeks without treatment. Visual acuity, intraocular pressure, and spectral domain optical coherent tomography-measured central macular thickness recordings at weeks 0 (baseline), 4, and 8. These parameters were compared using Bonferroni-corrected paired t-tests. At weeks 0, 4, and 8, logMAR visual acuity (mean ± SD) was 0.52 ± 0.41, 0.37 ± 0.40 (P = 0.0025 vs. baseline), and 0.45 ± 0.41, respectively; central macular thickness (μm) was 512 ± 164, 399 ± 154 (P = 0.0016 vs. baseline), and 488 ± 172 (P = 0.0116 versus week 4), respectively; and intraocular pressure (mm Hg) was 15.2 ± 3.1, 17.4 ± 4.2 (P = 0.0015 vs. baseline) and 15.8 ± 4.0, respectively. At week 4, in 12 (63%) of 19 eyes, central macular thickness had decreased more than 10%, and the mean change was -20% (-65% to +10%). In 14 of 19 eyes (74%) visual acuity (logMAR) had improved more than 0.1 at week 4. No subjects showed severe adverse effects related to the eye drops. Based on this short pilot study, topical dexamethasone-cyclodextrin eye drops are well tolerated, decrease central macular thickness, and improve visual acuity in DME. The results encourage comparative studies between dexamethasone cyclodextrin microparticle eye drops and other treatments for DME. (http://www.umin.ac.jp/ctr number, UMIN000001790.).

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