Spectral transmission of the optical media of the human eye with respect to keratitis and cataract formation

Ambach,W.; Blumthaler,M.; Schopf,T.; Ambach,E.; Katzgraber,F.; Daxecker,F.; Daxer,A.; The spectral transmissions of cornea, aqueous humour, lens and vitreous humour of human eyes were measured in the range from 250 nm to 800 nm in 1 nm steps using a high resolution double monochromator. Cornea and lens are good cut off filters; 1% transmission was measured in various cornea samples between 291 and 298 nm, and in different lenses between 389 and 414 nm. [Read More]

Stress distribution in the trochlear notch. A model of bicentric load transmission through joints

Eckstein,F.; Lohe,F.; Muller-Gerbl,M.; Steinlechner,M.; Putz,R.; In 16 cadaver humeroulnar joints, the distribution of subchondral mineralisation was assessed by CT osteoabsorptiometry and the position and size of the contact areas by polyether casting under loads of 10 N to 1280 N. Ulnas with separate olecranon and coronoid cartilaginous surfaces showed matching bicentric patterns of mineralisation. Under small loads there were separate contact areas on the olecranon and coronoid surfaces; these areas merged centrally as the load increased. [Read More]