TY - JOUR
T1 - A review of current knowledge on Electronic Vision Enhancement Systems for the visually impaired
AU - Wolffsohn, James S.
AU - Peterson, Rachael C.
PY - 2003/1/14
Y1 - 2003/1/14
N2 - Magnification can be provided to assist those with visual impairment to make the best use of remaining vision. Electronic transverse magnification of an object was first conceived for use in low vision in the late 1950s, but has developed slowly and is not extensively prescribed because of its relatively high cost and lack of portability. Electronic devices providing transverse magnification have been termed closed-circuit televisions (CCTVs) because of the direct cable link between the camera imaging system and monitor viewing system, but this description generally refers to surveillance devices and does not indicate the provision of features such as magnification and contrast enhancement. Therefore, the term Electronic Vision Enhancement Systems (EVES) is proposed to better distinguish and describe such devices. This paper reviews current knowledge on EVES for the visually impaired in terms of: classification; hardware and software (development of technology, magnification and field-of-view, contrast and image enhancement); user aspects (users and usage, reading speed and duration, and training); and potential future development of EVES. © 2003 The College of Optometrists.
AB - Magnification can be provided to assist those with visual impairment to make the best use of remaining vision. Electronic transverse magnification of an object was first conceived for use in low vision in the late 1950s, but has developed slowly and is not extensively prescribed because of its relatively high cost and lack of portability. Electronic devices providing transverse magnification have been termed closed-circuit televisions (CCTVs) because of the direct cable link between the camera imaging system and monitor viewing system, but this description generally refers to surveillance devices and does not indicate the provision of features such as magnification and contrast enhancement. Therefore, the term Electronic Vision Enhancement Systems (EVES) is proposed to better distinguish and describe such devices. This paper reviews current knowledge on EVES for the visually impaired in terms of: classification; hardware and software (development of technology, magnification and field-of-view, contrast and image enhancement); user aspects (users and usage, reading speed and duration, and training); and potential future development of EVES. © 2003 The College of Optometrists.
KW - closed-circuit television
KW - electronic vision enhancement system
KW - low vision
KW - visual impairment
UR - http://www.scopus.com/inward/record.url?scp=0037267624&partnerID=8YFLogxK
UR - http://onlinelibrary.wiley.com/doi/10.1046/j.1475-1313.2003.00087.x/abstract
U2 - 10.1046/j.1475-1313.2003.00087.x
DO - 10.1046/j.1475-1313.2003.00087.x
M3 - Article
C2 - 12535055
SN - 0275-5408
VL - 23
SP - 35
EP - 42
JO - Ophthalmic and Physiological Optics
JF - Ophthalmic and Physiological Optics
IS - 1
ER -