Ghost image intensities were measured for coated and uncoated glass and plastic lenses. Uncoated glass and plastic lenses exhibited similar high ghost image intensities. Magnesium fluoride coating on glass and a commercial coating on plastic (DAR) showed approximately equal reduction in ghost image intensity. A commercial multilayer coating (HEA) on glass effected the greatest reduction of ghost image intensity. Laboratory testing as directed by Military Specification MIL-C-675A revealed the following decreasing order of resistance to abrasion: Uncoated glass, HEA, commercially processed magnesium fluoride, Army-processed magnesium fluoride, DAR, and uncoated plastic.
*Read before the Annual Meeting of the American Academy of Optometry, Toronto, Canada, December 13, 1971. For publication in the January, 1973 issue of the American Journal of Optometry and Archives of American Academy of Optometry.
The research reported in this paper was conducted by personnel of the Ophthalmology Branch, USAF School of Aerospace Medicine, Aerospace Medical Division, AFSC, United States Air Force, Brooks Air Force Base, Texas. Further reproduction is authorized to satisfy the needs of the U. S. Government.
†Optometrist, M.S., Captain, USAF, Fellow, American Academy of Optometry.
aOptometrist, M.S., Major, USAF, Fellow, American Academy of Optometry.
‡Optometrist, M.S., Colonel, USAF, Fellow, American Academy of Optometry.
© 1973 American Academy of Optometry