1. CRTs pose health problems for operators;Ostberg;Int J Occup Hlth Saf
2. Sight, light and work;Weston,1962
3. Methods for evaluating discomfort glare aspects of lighting;Ostberg;Goteborg Psychol Rep,1974
4. The incidence of eyestrain among VDU operators;Cakir,1978
5. The eye;Heaton,1968