Zufriedenheit nach perforierender Keratoplastik

Böhringer, Daniel; Schindler, A.; Reinhard, Thomas

doi:10.1007/s00347-006-1373-0

Cited by 25 publications

(6 citation statements)

References 17 publications

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“…The 21 cm emission line from HI of spiral galaxies also show the need of extra masses besides visible stars (van Albada et al 1985;Begman 1989). Moreover, X-ray observations and strong gravitational lensing in early type galaxies and clusters imply that there are 60 ∼ 85% masses in some undetected form (Fabbiano et al 1989;Böhringer 1995;Loewenstein & White 1999). This so-called "missing mass" problem may be explained in two different ways: the existence of Dark Matter, and a modification of Newton law , hence of General Relativity (GR).…”

Section: Introductionmentioning

confidence: 97%

Gravitational Lensing in TeVe S

Chiu¹,

Ko²,

Tian³

2006

Gravitation and Astrophysics

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Since Bekenstein's (2004) creation of his Tensor-Vector-Scalar theory (TeVe S), the Modified Newtonian dynamics (MOND) paradigm has been redeemed from the embarrassment of lacking a relativistic version. One primary success of TeVe S is that it provides an enhancement of gravitational lensing, which could not be achieved by other MONDian theories. Following Bekenstein's work, we investigate the phenomena of gravitational lensing including deflection angles, lens equations and time delay. We find that the deflection angle would maintain its value while the distance of closest approach vary in the MOND regime. We also use the deflection angle law to derive magnification and investigate microlensing light curves. We find that the difference in the magnification of the two images in the point mass model is not a constant such as in GR. Besides, microlensing light curves could deviate significantly from GR in the deep MOND regime. Furthermore, the scalar field, which is introduced to enhance the deflection angle in TeVe S, contributes a negative effect on the potential time delay. Unfortunately this phenomenon is unmeasurable in lensing systems where we can only observe the time delay between two images for a given source. However, this measurable time delay offers another constraint on the mass ratio of the dark matter and MOND scenarios, which in general differs from that given by the deflection angle. In other words, for a lensing system, if two masses, m gN and m gM , are mutually alternatives for the deflection angles in their own paradigm, regarding the time delay they are in general in an exclusive relation.

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Section: Introductionmentioning

confidence: 97%

Gravitational Lensing in TeVe S

Chiu¹,

Ko²,

Tian³

2006

Gravitation and Astrophysics

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“…In patients with bullous keratopathy or epithelial bullae in cases of advanced corneal dystrophies, bandage contact lenses may be used to alleviate pain. If extended wear bandage contact lenses are put in, one must be cautious of the infectious risk; patients should apply antibiotic eye drops for the duration of the treatment and be followed up closely, and, if possible, corneal transplant surgery should be planned in a timely manner 16 , 44 .…”

Section: Medical Treatment Of Corneal Oedemamentioning

confidence: 99%

Corneal Oedema: Aetiology, Diagnostic Testing, and Treatment

Zander

Jiang

Reinhard

et al. 2022

Klin Monbl Augenheilkd

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Corneal oedema results from an underlying pathology, which can be diverse in origin, and may be mechanical, dystrophic, or inflammatory, and affect any layer of the cornea. Diagnostic tools such as Scheimpflug imaging and anterior segment optical coherence tomography have standardised quantification of corneal oedema and have become important aids in clinical practice. Timely diagnosis and treatment are key to preventing irreversible damage to the corneal ultrastructure, such as anterior corneal fibrosis or endothelial cell damage. The oedema usually resolves quickly when the underlying cause has been addressed. Symptomatic treatment using hyperosmolar agents has failed to show any benefits in oedema resolution or improvement in visual acuity compared to placebo. In contrast, rho-associated protein kinase (ROCK) inhibitors offer a promising option for medical treatment in cases of endothelial dysfunction, but their safety and efficacy must be further validated in large scale clinical trials. Until then, endothelial or penetrating keratoplasties remain the mainstay treatment where structural changes to the cornea have occurred.

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“…Nach einem Heilungsverlauf über mehrere Monate können mit optimalem Refraktionsausgleich häufig gute Visusergebnisse erzielt werden [1,26]. Allerdings benö-tigen bis zu 20 % der mit perforierender Keratoplastik (PK) operierten Patienten aufgrund von hohem oder irregulärem Astigmatismus formstabile Kontaktlinsen für eine bestmögliche Sehschärfe [8]. Zudem dauert die visuelle Rehabilitation in der Regel bis zu 18 Monate.…”

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“…Die BCVA liegt in 50 % der Fälle bei 0,5 (0,3 logMAR) oder besser [25]. Die Patientenzufriedenheit ist insgesamt hoch [8]. Nahtbezogene Probleme sind -bezogen auf einen langen Beobachtungszeitraum -von untergeordneter Relevanz [9].…”

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