Thomas Kohnen

..Slight deviations from the optical axis might affect the outcome in aspheric or multifocal IOLs...

..To examine the postoperative positional stability of a new angle-supported, hydrophobic acrylic phakic intraocular lens (pIOL)...

..Orthoptic follow-up examinations are also decisive for the long-term result...

..Cyclorotation of the eye occurs as the patient changes from the sitting position during aberrometry to the supine position during laser surgery and may lead to induction of lower and higher order aberrations...

..To compare internal horizontal anterior chamber (AC) diameter determined by optical coherence tomography (OCT) and horizontal corneal diameter (white-to-white [WTW]) using automated measurements...

..To report the safety and effectiveness of the AcrySof ReSTOR apodized diffractive intraocular lens (IOL), model MA60D3, when implanted into the capsular bag...

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..The main complications for myopic RLA include retinal detachment, while hyperopic refractive lens exchange may be associated with surgical problems in the narrower anterior eye segment...

..Complications are rare and differ for the three types of PIOL; for anterior chamber lenses these are mainly pupil ovalization and endothelial cell loss...

..To compare the change in anterior corneal higher-order (third- to fifth-order) aberrations (HOAs) induced by myopic and hyperopic LASIK...

..In rare cases, iris-fixated anterior chamber IOLs may induce refractive changes related to effects on the surrounding anatomic structures. This may be corrected by phakic IOL rotation or reenclavation of the phakic IOL with less tissue...

..If LASIK is planned after PKP, a 2-step approach is recommended to anticipate biomechanical effects and avoid overcorrection or undercorrection...

..To determine incision sizes for 6-mm optic foldable intraocular lenses (IOLs) implanted with injector systems...

..To assess safety, efficacy, predictability, stability, and change in aberrations after wavefront-guided LASIK for myopia and myopic astigmatism...

..All physicians who fulfil these prerequisites can apply to be named in the official list of suppliers and after fulfilling the prerequisites will be awarded a certificate on application...

..To evaluate the postoperative intraocular positional stability of 1 rigid poly(methyl methacrylate) (PMMA) phakic intraocular lens (pIOL) model and 2 foldable polysilicone-PMMA iris-fixated pIOL models...

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..Thus MICS procedures provide better predictability in terms of postoperative refractive results. This is of special interest when implanting advanced optic designs, such as aspheric, toric or multifocal IOLs...

..To evaluate visual function after bilateral implantation of apodized diffractive aspheric multifocal intraocular lenses (IOLs) with a +3.0 diopter addition (add) power...

..Cataract surgery, the most frequently performed operative procedure worldwide, typically concludes with the implantation of an artificial intraocular lens (IOL) to correct aphakia (absence of the crystalline lens)...

..Therefore, surgery should be less of a strain to patients, vision should recover faster, and optical quality should be optimized...

..To enhance patients' postoperative optical quality after cataract surgery, among others, different procedures to correct corneal astigmatism are used...

..To determine the effect of intraocular lens (IOL) asphericity on quality of vision after cataract removal...

..The 2 cases suggest that particularly in PDS patients, an IOL with an anterior sharp-edge design should be implanted in the capsular bag. Implantation in the ciliary sulcus should be avoided...

..In spite of the high requirements for postoperative optical quality, RLE can lead to an effective, safe, predictable, and stable outcome with a low risk of complications...

..Refractive surgical care and additional medical services possibly arising prior to or following this treatment are not basically covered by the statutory health insurance (GKV)...

..To evaluate incision sizes for 6.0 mm optic hydrophobic acrylic intraocular lenses (IOLs) implanted with different injector systems and surgical techniques...

..A differentiated patient selection in combination with optimized perioperative and postoperative management is necessary to achieve appropriate postoperative refractive results and patient satisfaction...

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..Parameters used to evaluate optical quality are visual acuity, contrast sensitivity, glare disability, night vision, higher-order aberrations, and subjective questionnaires...

..Maintenance of space between an IOL and the natural lens appears to be an important factor in preventing cataract formation after PPC IOL implantation...

..The limits of agreement ranged from 1.28 (Procyon) to 2.32 (Colvard). The digital infrared pupillometer (Procyon) demonstrated better repeatability and agreement in measuring scotopic pupil size than a handheld device (Colvard)...

..The purpose of this investigation was to evaluate the safety, efficacy, predictability, stability and complications of LASIK for the treatment of hyperopia and hyperopic astigmatism using a scanning spot excimer laser...

..High myopia and subluxated lenses may be treatable long-term with a scleral-fixated CTR and foldable IOL implantation; further evaluation of PCO is necessary...

..The purpose of this investigation was to evaluate the safety, efficacy, predictability, stability and complications using the scanning spot excimer LASIK technology...

..Correction of higher order aberrations has not yet been perfected since the predictability of corrections appears to be deserving of improvement on the one hand and aberrations are still induced by the technique on the other hand...

..To evaluate 4 stages of diffuse lamellar keratitis (DLK) after laser in situ keratomileusis using confocal microscopy...

..To determine scotopic pupil diameter in a normal pediatric population...

..The purpose of this study was to compare incision sizes and wound shape for both forceps and injector implantation of high-refractive-index silicone IOLs...

..Heparin surface-modified PMMA-IOLs as well as acrylic IOLs are associated with less postoperative inflammation than conventional intraocular lenses...

..The correction of refractive errors using laser in situ keratomileusis (LASIK) has become the primary refractive procedure worldwide. The purpose of this study was to evaluate LASIK within a retrospective cohort...

..To compare 2 infrared pupillometers with a videokeratographer and 2 aberrometers for the determination of scotopic pupil size...

..In the following report, we present clinical findings, microbiological investigation, treatment and outcome of the first case of Mycobacterium chelonae reported in Europe...

..To report the clinical and confocal microscopic characteristics of reticular folds (mudcracks) in a cornea after laser in situ keratomileusis (LASIK)...

..To perform an intraindividual comparison of posterior capsule opacification (PCO) with 2 foldable intraocular lenses (IOLs) and a foldable acrylic IOL 1 year after in-the-bag implantation...

..Intraocular lenses implanted in phakic eyes followed for 12 months demonstrate stable IOL position overall...

..Statistical analysis of intraindividual contrast sensitivity differences showed that in most patients, this Z(4)(0) difference was too low to have an effect on contrast sensitivity...

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..To determine the impact of spherical and aspheric foldable intraocular lens (IOL) tilt and decentration on optical quality after cataract surgery in an intraindividual comparative study...

..To investigate the influence of pupil and optical zone (OZ) diameter on higher-order aberrations (HOAs) after myopic wavefront-guided laser in situ keratomileusis (LASIK)...

..CONCLUSION: In comparison to a spherical IOL, the aspherical Tecnis IOL reduced Z(4)(0) and 4th-order RMS significantly for pupil diameters of 3 to 6 mm, whereas total HOA RMS was only significantly reduced for a pupil diameter of 6 mm...

..To compare the surgically induced corneal astigmatism after unsutured temporal and nasal unsutured limbal tunnel incisions...

..The improvement in BSCVA may take several months...

..To investigate the safety and effectiveness of the AcrySof phakic angle-supported intraocular lens (IOL) (Alcon Laboratories, Inc., Fort Worth, TX) for correction of moderate-to-high myopia in adults...

..None of the preoperatively measured parameters could predict the occurrence of PVD by LASIK. CONCLUSIONS: LASIK may in rare cases lead to new occurrence of PVD or extension of a previously existing partial PVD...

..To assess the predictability of postoperative refraction using the Holladay II-formula in paediatric patients randomized to undergo 2 different surgical procedures...

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..Setting: Department of Ophthalmology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany...

..Placement of the anterior IOL in the ciliary sulcus can lead to higher decentration of this IOL...

..To evaluate the effect of the AF-1 (UY) blue-light-filtering intraocular lens (IOL) with a yellow chromophore (Hoya) on visual function, including contrast vision and color perception...

..00 diopters was observed. Under treatment with topical steroids, the haze resolved and the spherical equivalent returned to baseline within 12 months...

..The purpose of the present study is to demonstrate the change of higher order wavefront aberrations (HOA) after implantation of an iris claw pIOL...

..To study the factors influencing the reliability (accuracy) of autorefractometry before and after laser in situ keratomileusis (LASIK) for myopia and myopic astigmatism...

..CONCLUSION: In vivo confocal microscopy confirmed the clinicopathologic findings of Salzmann's nodular degeneration. Observations by in vivo confocal microscopy were consistent with the histopathologic descriptions of SND...

..To determine the accuracy of the Holladay 2, Hoffer Q, SRK/T, and Haigis intraocular lens (IOL) power calculation formulas in high myopic and high hyperopic refractive lens exchange (RLE) with hydrophobic acrylic foldable IOLs...

..Under these conditions, aberrometry measurements should be repeated several times and outliers should be excluded in calculating the means...

..To identify factors that affect the change in lower- and higher-order wavefront aberrations after myopic wavefront-guided laser in situ keratomileusis (wg-LASIK)...

..The apodized diffractive optic represents a new design among multifocal IOLs. A comprehensive description of this principle with a review of current literature facilitates the understanding and correct application in IOL surgery...

..To describe corneal higher-order wavefront aberrations of clinically inconspicuous fellow eyes in patients with early keratoconus (KC)...

..To report clinical and confocal microscopy characteristics of haze-like opacities in corneas after laser in situ keratomileusis (LASIK)...

..In this article a retrospective analysis of patients presenting at a German university following refractive surgery abroad is presented...

..To evaluate the intraocular stability and safety of secondary iris-claw intraocular lenses (IOLs) in aphakic patients...

..To compare which parameter category (wavefront data, psychophysical data, or subjective symptoms) predicts best subjective quality of vision after LASIK...

..To assess and compare the morphology of laser in situ keratomileusis flaps (LASIK) created by a 60 kHz femtosecond laser and a mechanical microkeratome...

..The relationship between the observed PVD and LASIK merits further investigation...

..To determine individual risk factors for the development of postoperative complications after pediatric cataract surgery in the first 18 months of life...

..Posterior aberrations and thickness spatial profile data did not markedly improve discriminative ability over that of anterior wavefront data alone...

..The repeatability of the method and the influence of selected surgical (phaco time and phaco energy) and biometric parameters (axial length and anterior chamber depth) on the results were assessed...

..To compare wavefront-derived metrics to predict subjective quality of vision after laser in situ keratomileusis (LASIK) for myopia...

..The aim of this study was to assess the influence of visual symptoms on subjective quality of vision (SQV) after laser in situ keratomileusis (LASIK) and implantation of an intraocular lens in the phakic eye (pIOL implantation)...

..The purpose of this study was to evaluate visual acuity and binocular function after primary posterior chamber intraocular lens (IOL) implantation in children...

..To determine incision sizes for 5.5 mm total optic, foldable intraocular lenses (IOLs) made of silicone or hydrophobic acrylic...

..To investigate the clinical impact of the postoperative ocular wavefront error (WFE) on subjective quality of vision (SQV) after LASIK...

..To report the confocal microscopic findings of two different cases of diffuse lamellar keratitis (DLK) after primary laser in situ keratomileusis (LASIK) and LASIK flap relifting...

..Uni- and bilateral cataracts and their preoperative diagnostics have to be considered separately...

..As surgical treatment of refractive errors and measurement of cycloplegic refraction using cyclopentolate become more frequent, ophthalmologists should be aware of this unusual acute event...

..With immediate surgical treatment, good visual rehabilitation was achieved in this case. It should be reiterated that spectacles offer no protection against ocular trauma in these cases...

..To compare 3 infrared pupillometers under mesopic lighting conditions in refractive surgery candidates with moderate to high myopia...

..This placebo-controlled double-blind study examined the suitability of recording corneal epithelialization after phototherapeutic keratectomy (PTK) as a model of epithelial wound healing...

..A better understanding of the physiology of accommodation and presbyopia can contribute to the development of effective treatments...

..36 for the FACT charts.CONCLUSION: The FF-CATS is a reliable, sensitive, valid, and flexible test system for the determination of visual acuity and contrast sensitivity thresholds under variable ambient and glare luminance conditions...

..Scheimpflug photography is proved to be a useful technique for the postoperative evaluation of the positioning of phakic IOLs...

..For 3rd and 5th order aberrations, there was no difference between both IOLs.CONCLUSIONS: With implantation of aspherical IOLs, total HOA, 4th order and spherical aberration Z4.0 could be reduced compared to spherical IOLs...

..Some surgical procedures are based on concepts, the validity of which is not confirmed or which even contradict experimental evidence. Thus, it is necessary to assess the results and presumed mechanisms critically and objectively...

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..The purpose of this study was to compare the influence of residual bed thickness after myopic ablation on intraocular pressure measurements using Goldmann applanation tonometry and dynamic contour tonometry...