Conclusions Both Epi-LASIK and LASIK show their own characteristics in increased higher-order aberration at smaller and larger pupil sizes, and may create different effects on optical quality for photopic (smaller pupil) and scotopic conditions (larger pupil). We speculate that the visual performance in the Epi-LASIK group may be better than in the LASIK group for the larger pupil size. Content Type Journal ArticleCategory Refractive SurgeryDOI 10.1007/s00417-010-1394-xAuthors Xiao

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Authors: Liu A, Manche EE The authors report anterior segment optical coherence tomography (OCT) imaging findings in a case of central toxic keratopathy following laser in situ keratomileusis (LASIK) surgery for low hyperopia. OCT imaging 1 month after surgery demonstrates that the flap thickness is maintained and the location of stromal tissue loss is just posterior to the flap in the stromal bed in the affected area. This corresponds to the clinical observation of interface opacity extending posteri

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Authors: Kohnen T, Klaproth OK Non-corrected residual refractive errors after cataract extraction and implantation of an artificial intraocular lens (IOL) lead to limited visual acuity or suboptimal usage of enhanced optical properties of IOLs, such as bifocal implants, which are dependent on postoperative emmetropia. In addition to the established corneal procedures for correction of ametropia (excimer laser surgery or limbal relaxing incisions) sulcus supported pseudophakic supplementary IOLs can al

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Senthil Sirisha, Rathi Varsha, Garudadri ChandrasekharIndian Journal of Ophthalmology 2010 58(4):333-335A 21-year-old myope presented with decreased vision and corneal edema following vitreoretinal surgery for retinal detachment. While intraocular pressure (IOP) measurement with Goldmann applanation tonometer (GAT) was low, the digital tonometry indicated raised pressures. An interface fluid syndrome (IFS) was suspected and confirmed by clinical exam and optical coherence tomography. A tonopen used to mea

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The reliability of using a reference system intrinsic to the cornea has been evaluated in order to characterize corneas of subjects after refractive surgery. Data on 90 eyes operated on by LASIK to correct myopia and astigmatism were considered. The corneal parameters (curvature radii and corneal ... (Source: Journal of the Optical Society of America A)MedWorm Sponsor Message: Watch the new MedWorm demo and find out how to get all the very latest, relevant, organized information daily!

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A patient was treated bilaterally for myopia using laser in situ keratomileusis (LASIK). Preoperatively, there was no known risk factor for ectasia but a 20 μm between-eye difference in central mean corneal thickness was seen on the optical pachymetry map. Two years postoperatively, bilateral ectasia was diagnosed. This case suggests that abstention or surface ablation treatment may be a safer option than LASIK in patients showing central thickness asymmetry between eyes.Financial Disclosure: Neither aut

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In this study, CCT was measured by sequential Scheimpflug imaging, spectral-domain anterior segment optical coherence tomography (AS-OCT), and ultrasound (US) pachymetry.Results: Each of the 3 groups comprised 50 eyes. There were no differences between the 3 groups in age, sex, or intraocular pressure. In normal eyes, CCT was statistically significantly higher by US pachymetry (mean 525.8 μm ± 41.4) [SD] than by Scheimpflug imaging (mean 519.4 ± 40.9 μm) and AS-OCT (mean 517.9 ± 41.5 μm) (both P (

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Authors: Gorbatov M, Miller J, Yu PK, Cringle SJ, Yu DY New and more precise subretinal surgical techniques would be useful in a range of retinal diseases. The purpose of this study is to determine the feasibility of using fiberoptically delivered ultraviolet laser energy to transect or ablate subretinal tissues. Choroid segments dissected from fresh porcine eyes, with or without the retinal pigment epithelium (RPE), were clamped in a fluid bath. Pulsed fourth harmonic (266 nm) of a Nd:YAG laser radia

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AMSTERDAM, Netherlands, July 26, 2010 (GLOBE NEWSWIRE) -- Presbia, a leading medical device company that has developed a corneal inlay optical surgical solution for presbyopia, announced today that renowned refractive surgeon Dr. Ronald R. Krueger of Cleveland Clinic has joined its Medical Advisory Board. Dr. Krueger brings more than 26 years of experience in refractive surgery to the advisory board, which is chaired by Prof. Ioannis Pallikaris, M.D., widely regarded as the "father" of LASIK surgery. (Sou

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A 39-year-old woman who had bilateral laser in situ keratomileusis (LASIK) 5 months ago presents for poor quality of vision in both eyes. She has no significant systemic history. Before LASIK, the refraction was −5.25 +0.75 × 90 and the corrected distance visual acuity (CDVA) 20/20 in both eyes. The preoperative keratometry (K) readings were 43.50 diopters (D) and 44.37 D in the right eye and 43.62 D and 44.75 D in the left eye. shows the preoperative corneal topography and pachymetry maps. The LASIK

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During the past years, the wish to become independent of spectacles has been growing among cataract and presbyopic patients due to many factors, such as the increase in near visual demands, the aesthetic need for a spectacle‐free image and ageing of refractive surgery patients, among others. This review assesses recently published studies that analyse visual and optical performance through different metrics of eyes implanted with multifocal intraocular lenses (IOLs), particularly hybrid IOL designs. The

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Content Type Journal ArticleDOI 10.1007/s00417-010-1515-6Authors Xiaoyan Yang, Tianjin Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, No 4, Gansu Rd, Heping District, Tianjin, 300020 ChinaYan Wang, Tianjin Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, No 4, Gansu Rd, Heping District, Tianjin, 300020 ChinaKanxing Zhao, Tianjin Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, No 4, Gansu Rd, Heping District, Tianjin,

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Conclusions: The increase in anterior corneal aberrations after myopic LASIK was similar after mechanical microkeratome and femtosecond laser flap creation. Visual acuity, refraction, and the optical quality of the cornea after LASIK remained stable through 4 years postoperatively in both groups.Financial Disclosure: No author has a financial or proprietary interest in any material or method mentioned. (Source: Journal of Cataract and Refractive Surgery)

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Conclusion: The changes in optical quality after LASIK surgery depended on the patient’s preoperative optical quality; visual acuity showed the same trend, although no change was significant.Financial Disclosure: No author has a financial or proprietary interest in any material or method mentioned. (Source: Journal of Cataract and Refractive Surgery)MedWorm Sponsor Message: Watch the new MedWorm demo and find out how to get all the very latest, relevant, organized information daily!

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