ABSTRACT
BACKGROUND: Opacification of the ocular lens is an important effect of exposure to ionizing radiation. Astronauts and cosmonauts are exposed to relatively high doses of all types of radiation in space, including high-energy particle radiation. A study was initiated to examine the lenses of the eyes of astronauts/cosmonauts to detect signs of radiation-induced cataracts. The aim of this study was to take a first step towards gaining improved, quantitative insight into the risk of radiation-induced cataract associated with long space missions. METHODS: The lenses of 21 former astronauts and cosmonauts were examined, using an upgraded Topcon SL-45 B Scheimpflug camera system. The degrees of opacification in this group of astronauts and cosmonauts were compared with the measurements in a reference group. This reference group was established by examining a cohort of 395 persons using the same Scheimpflug system. RESULTS: Initial results indicated that opacity values in most of the astronauts and cosmonauts were slightly to strongly increased in regions IV (posterior cortex) and V (posterior capsule), compared with the average opacity values for the respective age-group of the reference cohort. CONCLUSION: The aim of this study - to conduct first examinations of astronauts' and cosmonauts' ocular lenses with regard to signs of radiation-induced cataract - was successfully achieved in a total of 21 astronauts and cosmonauts using a Scheimpflug camera system. It is planned to examine a larger group of astronauts and cosmonauts in the future.
Subject(s)
Astronauts , Cataract/etiology , Lens, Crystalline/radiation effects , Occupational Diseases/etiology , Occupational Exposure , Radiation Injuries/etiology , Adolescent , Adult , Aged , Aged, 80 and over , Cataract/diagnosis , Diagnostic Techniques, Ophthalmological , Humans , Male , Middle Aged , Photography , Radiation Injuries/diagnosis , Radiation, Ionizing , Reference ValuesABSTRACT
BACKGROUND: Teleconsultation services have the potential to improve the communication among different medical care providers and between them and the patient. Increasing effectiveness in the shape of a savings in time or cost is often the result of better communication. METHODS: A study was performed in order to demonstrate the feasibility of teleconsultation services, using the perioperative management of cataract patients as an example, and to provide data on the quality, acceptance and effectiveness of these services in comparison with a control group experiencing normal treatment. RESULTS: Over a period of 3 months 42 patients of the teleconsultation group and 20 controls were studied. There were two referring ophthalmologists and three surgeons. The teleconsultation group had one consultation fewer with the ophthalmic surgeon because of the teleconsultation service. Patient satisfaction was slightly higher using the new technology. Patients would like to see this technique used again should surgery on the second eye become necessary. CONCLUSIONS: Teleconsultation services are ready to support and improve perioperative cataract management. Patients' confidence in their medical treatment was increased by using teleconsultation services. Physicians will expand the use of teleconsultation.
