Perhaps an unusual post for a LASIK blog, but we find ourselves increasingly discovered in the world from our website and more importantly from this blog. At any instant in time there are a myriad of people in front of a computer screen, much like the one you are reading now. They are using their eyes, their vision, to see that screen and to see the world beyond it. Our job at Dishler Laser Institute is to make that vision as clear as possible without the need for glasses or contact

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Conclusion This is a well-conducted Cochrane review, which carried out a thorough search for all suitable trials comparing laser eye surgery with phakic intraocular lenses for moderate to severe short-sightedness. Both techniques achieved the same success rate for the proportion of people who had 20/20 vision 12 months after surgery. People given phakic lenses were less likely to have a loss in their ‘best spectacle corrected visual acuity’ after treatment. However, on two occasions, cataracts develop

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A new type of procedure for correcting short-sightedness could be safer than laser eye surgery, according to a new scientific review. (Source: the Mail online | Health)

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In this study, the authors initially described the corneal posterior shape by elevation and created a detailed evaluation reference database determining the shape of the corneal posterior surface in normal human eyes. Moreover, the authors retrospectively studied the data on corneal posterior elevation changes after LASIK and epi-LASIK for myopia and myopic astigmatism and evaluated the changes along four districts at center, paracenter, midperiphery, and periphery. (Source: Investigative Ophthalmology)

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Conclusions Improvements in Pelli-Robson CS scores were observed during the first year after IVR/IVB in eyes with mCNV. Content Type Journal ArticleCategory Retinal DisordersDOI 10.1007/s00417-010-1341-xAuthors Sarah Moussa, The Ludwig Boltzmann Institute for Retinology and Biomicroscopic Laser Surgery Vienna AustriaSiamak Ansari-Shahrezaei, The Ludwig Boltzmann Institute for Retinology and Biomicroscopic Laser Surgery Vienna AustriaEva Smretschnig, The Ludwig Boltzmann Institute for R

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In reference to the article describing histological examination of epi-LASIK flaps, we report a unique postoperative problem. A 22-year-old man had epi-LASIK in both eyes after standard refractive surgery evaluation. The refractive error was −2.00 diopters sphere (DS) in each eye. Intraoperatively, the patient squeezed his eyes as the epikeratome was creating the epithelial flap. The epithelial flaps appeared thin and were spontaneously amputated. The laser was delivered as usual, and bandage contact le

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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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A 31-year-old man was referred to us 2 months after bilateral laser in situ keratomileusis (LASIK). On presentation, the corrected distance visual acuity was hand motion in the right eye and 20/25 in the left eye. Slitlamp examination showed a diffuse central stromal infiltrate, flap melting, and hypopyon in the right eye and marked interface opacities with crystal-like edges in the left eye. Flap lift and irrigation were performed. Because of the progressive keratitis, penetrating keratoplasty (PKP) was

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Purpose: To compare changes in corneal hysteresis (CH) and the corneal resistance factor (CRF) in myopic and hyperopic laser in situ keratomileusis (LASIK) and evaluate their relationship to the number of photoablative pulses delivered, a surrogate for ablation volume.Setting: Cleveland Clinic Cole Eye Institute, Cleveland, Ohio, USA.Methods: Preoperative and 1-week postoperative Ocular Response Analyzer measurements in eyes that had femtosecond-assisted LASIK were studied retrospectively. Changes in CH a

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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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The procedure provides better eyesight with less chance of vision loss. For those whose eyes aren't that bad, laser surgery is the best option. Flashy lasers get much of the attention in vision-correcting surgery, but they can't fix severe shortsightedness. For those wearing the thickest glasses, a newer procedure provides better eyesight with less risk of vision loss, according to a recent study. (Source: L.A. Times - Health)

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Conclusions: The 4-year results indicate that ICRS implantation is effective and safe in the correction of low myopia in patients for whom excimer laser surgery is contraindicated because of abnormal topography, including forme fruste keratoconus. The achieved refractive correction remained stable throughout the follow-up.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 presence of K-structures and ACM may be an index to identify eyes that had a previous refractive surgical procedure (surface ablation or LASIK) and be a health index of Bowman layer and adjacent anterior stroma. PMID: 20672768 [PubMed - as supplied by publisher] (Source: Ophthalmic Surgery, Lasers and Imaging : the Official Journal of the International Society for Imaging in the Eye)

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Not only was this patient overcorrected, the postoperative topographic maps show that the treatment was decentered (temporally) in both eyes. Primary hyperopic correction of more than 5.00 or 6.00 D with conventional or custom wavefront LASIK, PRK, laser-assisted subepithelial keratectomy, or conductive keratoplasty is very difficult to treat without regression. Although wavefront-guided retreatment for consecutive hyperopia after primary myopic treatment has been reported, most patients had low preoperat

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This patient with poor-quality vision after myopic LASIK requires careful handling because of the poor refractive outcome. She has become a consecutive hyperope with a large overcorrection in both eyes. The multizone ablation as described is not capable of being performed in the United States with a Visx Star S4 laser. Myopic corrections of less than 6.00 D with this laser are usually 1 zone with a blend in the United States. I admit I am unfamiliar with a 3-zone ablation profile as described. (Source: Jo

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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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In this case, the most important issue to rule out before further surgical intervention is post-LASIK corneal ectasia. The refraction went from −5.25 +0.75 × 90 in both eyes preoperatively to +6.50 D in the right eye and +7.00 D in the left eye postoperatively. Furthermore, the K values of both corneas decreased by approximately 10.00 D. The refractive and K values show that the ablation in both corneas was to correct approximately −10.00 to −12.00 D. The risk for post-LASIK ectasia in such cases i

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CONCLUSIONS: In post-LASIK myopic eyes, although a high correlation has been shown between Pentacam and UP measurements, Pentacam tends to overestimate CCT compared to UP. Pentacam probably cannot be used interchangeably with UP in post-LASIK eyes for myopia. PMID: 20815096 [PubMed - in process] (Source: European Journal of Ophthalmology)

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