What is low vision? A re-evaluation of definitions

Optometry and Vision Science

Volumn 76, Issue 4, 1999, Pages 198-211

  Leat, Susan J ^a   Legge, Gordon E ^b   Bullimore, Mark A ^c  

^a UNIVERSITY OF WATERLOO   (Canada)

^b UNIVERSITY OF MINNESOTA   (United States)

^c OHIO STATE UNIVERSITY   (United States)

Author keywords

Contrast sensitivity; Legal blindness; Low vision; Visual acuity; Visual disability; Visual fields; Visual impairment

Indexed keywords

DISEASES; EPIDEMIOLOGY; HANDICAPPED PERSONS; PHYSIOLOGY; STANDARDS; VISION AIDS;

CONTRAST SENSITIVITY; LEGAL BLINDNESS; LOW VISION; VISUAL ACUITY; VISUAL DISABILITY; VISUAL FIELDS; VISUAL IMPAIRMENT;

VISION;

ARTICLE; BINOCULAR VISION; BLINDNESS; CONTRAST SENSITIVITY; DISABILITY; DISEASE CLASSIFICATION; HUMAN; LEGAL ASPECT; MONOCULAR VISION; PRIORITY JOURNAL; VISUAL ACUITY; VISUAL DISORDER; VISUAL FIELD; VISUAL IMPAIRMENT;

BLINDNESS; CONTRAST SENSITIVITY; DISABILITY EVALUATION; HUMANS; TERMINOLOGY; VISION, BINOCULAR; VISION, LOW; VISUAL ACUITY; VISUAL FIELDS; VISUALLY IMPAIRED PERSONS;

EID: 0032951955     PISSN: 10405488     EISSN: None     Source Type: Journal    
DOI: 10.1097/00006324-199904000-00023     Document Type: Article

References (89)

1. World Health Organization. International Classification of Impairments, Disabilities and Handicaps: A Manual of Classification Relating to the Consequences of Disease. Geneva: World Health Organization, 1980.
2. Colenbrander A. What's in a name: more people are blinded by definition than by any other cause. J Videol 1996;1:13-20.
3. World Health Organization Study Group on the Prevention of Blindness. World Health Organization Technical Report Series. Geneva: World Health Organization, 1972:518.
4. Murdoch IE, Jones BR, Cousens S, Liman I, Babalola OE, Dauda J, Abiose A. Visual field constriction as a cause of blindness or visual impairment. Bull WHO 1997;75:141-6.
5. BD8 Form. London: Her Majesty's Stationery Office, 1991.
6. Fielder AR, Best AB, Bax MCO. The Management of Visual Impairment in Childhood. London: Mac Keith Press (Cambridge University Press), 1993.
7. Ford M, Heshel T. The In Touch Handbook. London: Broadcasting Support Services for BBC Radio 4, 1993.
8. Grey RH, Burns-Cox CJ, Hughes A. Blind and partial sight registration in Avon. Br J Ophthalmol 1989;73:88-94.
9. Bailey IL, Lovie JE. New design principles for visual acuity letter charts. Am J Optom Physiol Opt 1976;53:740-5.
10. Bailey IL. Designation of visual acuity in logarithmic units. Optom Mon 1980;71:53-8.
11. Bier N. Correction of Subnormal Vision. London: Butterworths, 1970.
12. Kirchner C. Data on Blindness and Visual Impairment in the U.S.: A Resource Manual on Social Demographic Characteristics, Education, Employment and Income, and Service Delivery. New York: American Foundation for the Blind, 1988.
13. Ford M, Heshel T. In Touch 1995-1996 Handbook. London: Public Broadcasting Support Services, 1995.
14. Tielsch JM, Javitt JC, Coleman A, Katz J, Sommer A. The prevalence of blindness and visual impairment among nursing home residents in Baltimore. N Engl J Med 1995;332:1205-9.
15. Rubin GS, West SK, Munoz B, Bandeen-Roche K, Zeger S, Schein O, Fried LP. A comprehensive assessment of visual impairment in a population of older Americans. The SEE Study. Salisbury Eye Evaluation Project. Invest Ophthalmol Vis Sci 1997;38:557-68.
16. National Advisory Eye Council. Vision Research: A National Plan: 1994-1998. Washington, DC: U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, 1993:305-21.
17. Mehr EB, Fried AN. Low Vision Care. Chicago: Professional Press, 1975:1.
18. Robbins HG. The low vision patient of tomorrow. Aust J Optom 1978;61:54-64.
19. Faye EE. Clinical Low Vision 2nd ed. Boston: Little, Brown, 1984:6.
20. Nowakowski RW. Primary Low Vision Care. Norwalk, CT: Appleton & Lange, 1994:2.
21. Leat SJ, Rumney NJ. The experience of a university-based low vision clinic. Ophthalmic Physiol Opt 1990;10:8-15.
22. Robbins HG. Low vision care for the over 80's. Aust J Optom 1981; 64:243-51.
23. Humphry RC, Thompson GM. Low vision aids - evaluation in a general eye department. Trans Ophthalmol Soc UK 1986;105: 296-303.
24. Yap M, Cho J, Woo G. A survey of low vision patients in Hong Kong. Clin Exp Optom 1990;73:19-22.
25. Kleen SR, Levoy RJ. Low vision care: correlation of patient age, visual goals, and aids prescribed. Am J Optom Physiol Opt 1981;58:200-5.
26. Office of Populations Censuses and Surveys. The Prevalence of Disability among Adults. London: Her Majesty's Stationery Office, 1993.
27. Statistics Canada. Census of the Population: Disability Question Guide for Respondents. Ottawa: Ministry of Supply and Services, 1986.
28. The Lighthouse, Inc. The Lighthouse National Survey on Vision Loss: The Experience, Attitudes and Knowledge of Middle-Aged and Older Americans. New York: The Lighthouse, Inc., 1995.
29. Tielsch JM, Sommer A, Witt K, Katz J, Royall RM. Blindness and visual impairment in an American urban population. The Baltimore Eye Survey. Arch Ophthalmol 1990;108:286-90.
30. Klein R, Klein BE, Linton KL, De Mets DL. The Beaver Dam Eye Study: visual acuity. Ophthalmology (Rochester) 1991;98:1310-5.
31. Ross JE, Bron AJ, Clarke DD. Contrast sensitivity and visual disability in chronic simple glaucoma. Br J Ophthalmol 1984;68:821-7.
32. Elliott DB, Hurst MA, Weatherhill J. Comparing clinical tests of visual function with the patient's perceived visual disability. Eye 1990;4:712-7.
33. Rubin GS, Roche KB, Prasada-Rao P, Fried LP. Visual impairment and disability in older adults. Optom Vis Sci 1994;71:750-60.
34. Elliott DB, Yang KC, Whitaker D. Visual acuity changes throughout adulthood in normal, healthy eyes: seeing beyond 6/6. Optom Vis Sci 1995;72:186-91.
35. Ehlers H. Clinical testing of visual acuity. Arch Ophthalmol 1953; 49:431-4.
36. Wild JM, Hussey MK. Some statistical concepts in the analysis of vision and visual acuity. Ophthalmic Physiol Opt 1985;5:63-71.
37. Brown B, Lovie-Kitchin J. Repeated visual acuity measurement: establishing the patient's own criterion for change. Optom Vis Sci 1993;70:45-53.
38. Frisen L, Frisen M. How good is normal visual acuity?. A study of letter acuity thresholds as a function of age. von Graefes Arch Klin Exp Ophthalmol 1981;215:149-57.
39. Elliott DB, Sheridan M. The use of accurate visual acuity measurements in clinical anti-cataract formulation trials. Ophthalmic Physiol Opt 1988;8:397-401.
40. National Research Council, Committee on Vision. Measurement of Visual Field and Visual Acuity for Disability Determination. Washington, DC: National Academic Press, 1994.
41. Reeves BC, Wood JM, Hill AR. Reliability of high- and low-contrast letter charts. Ophthalmic Physiol Opt 1993;13:17-26.
42. Ariyasu RG, Lee PP, Linton KP, LaBree LD, Azen SP, Siu AL. Sensitivity, specificity, and predictive values of screening tests for eye conditions in a clinic-based population. Ophthalmology (Rochester) 1996;103:1751-60.
43. Flammer J, Drance SM, Augustiny L, Funkhouser A. Quantification of glaucomatous visual field defects with automated perimetry. Invest Ophthalmol Vis Sci 1985;26:176-81.
44. David Henson, personal communication.
45. Williams TD. Goldmann visual field norms for age groups 25 to 75 years: 1-1, III-3 and III-4 targets. Can J Optom 1996;58:170-5.
46. Heijl A, Lindgren A, Lindgren G. Test-retest variability in glaucomatous visual fields. Am J Ophthalmol 1989;108:130-5.
47. Esterman B. Functional scoring of the binocular field. Ophthalmology (Rochester) 1982;89:1226-34.
48. Lovie-Kitchin J, Mainstone J, Robinson J, Brown B. What areas of the visual field are most important for mobility in low vision patients? Clin Vis Sci 1990;5:249-63.
49. Drasdo N, Peaston WC. Sampling systems for visual field assessment and computerized perimetry. Br J Ophthalmol 1980;64:705-12.
50. Verriest G. Percentage impairment by visual field defects In: Heijl A, Greve E, eds. Seventh International Visual Field Symposium, Amsterdam, September 1986. Dordrecht, The Netherlands: Dr. W. Junk Publishers, 1987.
51. Arditi A. The volume visual field: a basis for functional perimetry. Clin Vis Sci 1988;3:173-83.
52. Rubin GS, Legge GE. Psychophysics of reading. VI - The role of contrast in low vision. Vision Res 1989;29:79-91.
53. Whittaker SG, Lovie-Kitchin J. Visual requirements for reading. Optom Vis Sci 1993;70:54-65.
54. Leat SJ, Woo GC. The validity of current clinical tests of contrast sensitivity and their ability to predict reading speed in low vision. Eye 1997;11:893-9.
55. Marron JA, Bailey IL. Visual factors and orientation-mobility performance. Am J Optom Physiol Opt 1982;59:413-26.
56. Owsley C, Sloane ME. Contrast sensitivity, acuity, and the perception of "real-world" targets. Br J Ophthalmol 1987;71:791-6.
57. Lennerstrand G, Ahlstrom CO. Contrast sensitivity in macular degeneration and the relation to subjective visual impairment. Acta Ophthalmol (Kbh) 1989;67:225-33.
58. Elliott DB, Whitaker D. How useful are contrast sensitivity charts in optometric practice? Case reports. Optom Vis Sci 1992;69:378-85.
59. Leguire LE. Do letter charts measure contrast sensitivity? Clin Vis Sci 1991;6:391-400.
60. Elliott DB, Sanderson K, Conkey A. The reliability of the Pelli-Robson contrast sensitivity chart. Ophthalmic Physiol Opt 1990;10: 21-4.
61. Elliott DB, Bullimore MA. Assessing the reliability, discriminative ability, and validity of disability glare tests. Invest Ophthalmol Vis Sci 1993;34:108-19.
62. Beck RW, Diehl L, Cleary PA, and the Optic Neuritis Study Group. The Pelli-Robson letter chart: normative data for young adults. Clin Vis Sci 1993;8:207-10.
63. Brown B, Lovie-Kitchin JE. High and low contrast acuity and clinical contrast sensitivity tested in a normal population. Optom Vis Sci 1989;66:467-73.
64. Regan D. Low-contrast letter charts and sinewave grating tests in ophthalmological and neurological disorders. Clin Vis Sci 1988;2: 235-50.
65. Pardhan S. A comparison of binocular summation in young and older patients. Curr Eye Res 1996;15:315-9.
66. Pardhan S. Binocular performance in patients with unilateral cataract using the Regan test: binocular summation and inhibition with low-contrast charts. Eye 1993;7:59-62.
67. Tobin MJ, Hill EW. The aging process and visual disability investigating change. New Beacon LXXIV 1990;881:381-5.
68. Elliott DB, Trukolo-Ilic M, Strong JG, Pace R, Plotkin A, Bevers P. Demographic characteristics of the vision-disabled elderly. Invest Ophthalmol Vis Sci 1997;38:2566-75.
69. Hall A, Sacks SZ, Dornbusch H, Raasch T. A preliminary study to evaluate patient services in a low vision clinic. J Vision Rehab 1987; 1:7-25.
70. Mills RP, Drance SM. Esterman disability rating in severe glaucoma. Ophthalmology (Rochester) 1986;93:371-8.
71. De Marco LM, Massof RW. Distributions of print sizes in U.S. newspapers. J Vis Impairment Blind 1997;91:9-13.
72. Bailey IL, Lovie JE. The design and use of a new near-vision chart. Am J Optom Physiol Opt 1980;57:378-87.
73. Sultan MB, Meehan RH, Castor C. The impact of ocular disease on the instrumental activities of daily living. Invest Ophthalmol Vis Sci 1997;38:S710.
74. Charman WN. Visual standards for driving. Ophthalmic Physiol Opt 1985;5:211-20.
75. Canadian Medical Association. Physician's Guide to Driver Examination. 5th ed. Ottawa: Canadian Medical Association, 1991.
76. Drasdo N, Haggerty CM. A comparison of the British number plate and Snellen vision tests for car drivers. Ophthalmic Physiol Opt 1981;1:39-54.
77. Cresset JA, Meyer FM. Risk of accidents among elderly car drivers with visual acuity equal to 6/12 or 6/15 and lack of binocular vision. Ophthalmic Physiol Opt 1994;14:33-7.
78. Shipp MD, Penchansky R. Vision testing and the elderly driver: is there a problem meriting policy change? J Am Optom Assoc 1995; 66:343-51.
79. Munton G. Vision. In: Taylor JF, ed. Medical Aspects of Fitness to Drive: A Guide for Medical Practitioners. London: Medical Commission on Accident Prevention, 1995:118-32.
80. North RV. The relationship between the extent of visual field and driving performance - a review. Ophthalmic Physiol Opt 1985;5: 205-10.
81. Johnson CA, Keltner JL. Incidence of visual field loss in 20,000 eyes and its relationship to driving performance. Arch Ophthalmol 1983; 101:371-5.
82. Ball K, Owsley C, Sloane ME, Roenker DL, Bruni JR. Visual attention problems as a predictor of vehicle crashes in older drivers. Invest Ophthalmol Vis Sci 1993;34:3110-23.
83. Wood JM, Troutbeck R. Effect of restriction of the binocular visual field on driving performance. Ophthalmic Physiol Opt 1992;12:291-8.
84. Wood JM, Troutbeck R. Elderly drivers and simulated visual impairment. Optom Vis Sci 1995;72:115-24.
85. Appel SD, Brilliant RL, Reich LN. Driving with visual impairment: facts and issues. J Vision Rehab 1990;4:19-31.
86. Raasch TW, Leat SJ, Kleinstein RN, Bullimore MA, Cutter GR. Evaluating the value of low-vision services. J Am Optom Assoc 1997; 68:287-95.
87. Mangione CM, Lee PP, Berry SH, Hays RD, Janz NK, Klein R, Owsley C. Development of a questionnaire for the assessment of vision function. Invest Ophthalmol Vis Sci 1995;36:S428.
88. Bullimore MA, Raasch TW, Cutter GC, Kleinstein RN, Leat SJ. Quality of life assessment in a low vision population. Invest Ophthalmol Vis Sci 1997;38:S710.
89. Cataract Management Guideline Panel. Cataract in Adults: Management of Functional Impairment. Rockville, MD: U.S. Department of Health and Human Services, Public Health Service, Agency for Health Care Policy and Research, 1993.