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- Abrahamsson, Maths, 1953, et al.
(author)
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The occurrence of congenital cataract in western Sweden
- 1999
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In: Acta Ophthalmologica Scandinavica. - : Wiley. - 1395-3907. ; 77:5, s. 578-580
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Journal article (peer-reviewed)abstract
- Purpose: To estimate the occurrence of congenital cataract in a Nordic country. Methods: In 1980, we constructed a database in the Department of Ophthalmology Goteborg University, containing basic data from all cases in western Sweden diagnosed with congenital cataract. By collecting and processing these data from 1980 onwards, we hoped to improve the management of congenital cataract treatment and to optimize the outcome of the treatment. Results: In this study, the incidence of congenital cataract in the four western counties of Sweden was evaluated. The occurrence rate of all cases with congenital cataract during the study period was 36 cases per 100 000. The occurrence rate for dense bilateral and all unilateral cases were both 14 per 100 000 each. Conclusion: There were no time-related changes in incidence of congenital cataract from 1980 until today, although there was a large variation in the yearly incidence.
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- Hashas, A. S. K., et al.
(author)
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A new diagnostic method for retinal breaks in patients with posterior vitreous detachment: Ultra-wide-field imaging with the Zeiss Clarus 700
- 2023
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In: Acta Ophthalmologica. - : Wiley. - 1755-375X .- 1755-3768. ; 101:6, s. 627-635
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Journal article (peer-reviewed)abstract
- PurposeThis study was performed with the aim of finding a more convenient and less time-consuming method to diagnose retinal breaks in posterior vitreous detachment (PVD) patients. MethodsA prospective double-blind observational case study was performed with patients who were admitted to the Eye Emergency Department Sahlgrenska University Hospital with PVD symptoms and approved to participate in the study (n = 128). Standard slit lamp examination was compared with images from a Zeiss Clarus 700 ultra-wide-field camera (UWFC). Patients were examined and photographed by an independent operator. Data and image review was performed by three independent reviewers with varying experience. Retinal break detection with the two different methods (detailed eye examination by well-trained ophthalmologist and UWFC evaluations) was analysed statistically. ResultsAfter excluding diagnoses other than PVD as well as unclear images due to cataracts, vitreous bleeding, etc., a total of 103 eyes with PVD were evaluated. A total of 38 ruptures in 25 patients were detected by routine examination and were subjected to laser treatment. UWFC images were reviewed by three ophthalmology consultants and compared with routine examinations. Sensitivity values in detecting retinal ruptures in UWFC images of the three reviewers were 0.89, 0.87 and 0.79, and specificity values were 0.88, 0.86 and 0.93 (kappa values: 0.742, 0.689 and 0.728) respectively. ConclusionAlthough there have been rapid developments in imaging with UWFC in recent years and it is a very promising method for the future, routine clinical examination is still the only valid method for the detection of retinal tears today.
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- Knutsson, Per, 1978, et al.
(author)
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Correction of static and non-common path aberrations in an adaptive optics system using inherent calibration data
- 2021
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In: Optics Express. - : Optica Publishing Group. - 1094-4087. ; 29:3, s. 3406-3414
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Journal article (peer-reviewed)abstract
- For low-order adaptive optics systems, a method that is able to correct for system aberrations in the final focal plane is presented. The paper presents a novel figure of merit, corresponding to the integrated non-normalized tip-tilt-free optical transfer function. The inherent singular value decomposition modal content of the interaction matrix is used to optimize this figure of merit. The method has proven to be stable and robust, providing a simple mean to facilitate diffraction limited imaging in an experimental setup for ophthalmic applications. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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