Peripheral optimized CXL and high power Theo Seiler
- Slides: 16
Peripheral optimized CXL and high power Theo Seiler Institut für Refraktive und Ophthalmo-Chirurgie (IROC ) and University of Zürich Seite 1
PMD thinnest point steepest point Seite 2
PMD vs KC PMD thinnest pachymetry / μm KC 700 500 300 Seite 3 0 0. 5 1 radial distance to apex / mm 2
PMD Seite 4
PMD Seite 5
CXL In the majority of the keratectasia cases the weakest point of the cornea that needs CXL most is 1 to 3 mm away from the center Seite 6
study OCT 1 month post CXL, 10 eyes, inhomogeneity of the beam in curve th 1 relative depth in % 100 90 th 80 th 1 70 mav 60 50 0 Seite 7 0 1 2 radial distance / mm 3
proposal In order to create a homogeneous CXL-effect also in the periphery of the cornea irradiation with a top hat-profile is not good enough. 3 mm away from the center the light intensity needs to be increased by at least 25% Seite 8
profile UV-X 2000 Avedro I 0 UV-X 1000 8 mm Seite 9 4 mm 0 4 mm 8 mm
profile Crosslinking profile of the UV-X 2000 Seite 10
CXL-types volume-type 0μm 30 min 3. 00 m. W/cm² surface-type 9 min 10. 00 m. W/cm² 100μm 200μm 300μm 400μm 500μm 600μm Seite 11 0. 1% 0. 5% 30 min 2 min
CXL-types Pseudo-Bowmans Seite 12
CXL-types Seite 13
CXL-types volume-type CXL-depth 250 to 330 μm Seite 14
CXL-types Applications volume-type (homogeneous riboflavin, low power) • infectious keratitis • melting diseases • keratoconus ? Applications surface-type riboflavin gradient, high power) • refractive laser surgery • customized CXL Seite 15 (high
conclusion 1. In the majority of the cases a peripheral CXL is mandatory 2. Second generation CXL lightsources need an optimized beam profile 3. The surface-type CXL works only if the central irradiance guarantees an illumination time of 10 min and less Seite 16
- Cxl behandling
- Roberta: a robustly optimized bert pretraining approach
- Wioa optimized system
- Modello di seiler
- Seiler skin
- Git
- Power traiangle
- Theo thomassen
- Theo góc độ địa lý mạng máy tính
- Théo jansen
- Theo marzials
- Theo jacobi
- Theo bakker huisarts sneek
- Kontak theo de jager
- Kontak deur theo de jager
- Teor nbapq qtheo
- Theo hodge md