Sains Ma1aysiana 27: 39-46 (1998)                                                                                                      Sains Hayat/

                                                                                                                                                                       Life Sciences

Contrast Sensitivity in Malaysian Children and Adult

Sharanjeet Kaur

Department of Optometry

Faculty of Allied Health Sciences

Universiti Kebangsaan Malaysia

Jalan Raja Muda, 50300 Kuala Lumpur

ABSTRACT

The importance of comparing the results of contrast sensitivity tests to age matched normals has been demonstrated in numerous studies. To date no studies in Malaysia have been done to show the normal values in children and adults using the Pelli-Robson chart. In this study, Pelli-Robson contrast sensitivity was measured for 200 normal healthy observers in the age range of 4 to 30 years. It was found that children in the age range of 4 to 6 years had a statistically significant lower contrast sensitivity of 1.69 ± 0.10 log units binocularly as compared to other subjects between the age group of 7-30 years who had an average contrast sensitivity of 1.82 log units binocularly.

ABSTRAK

Kepentingan perbandingan keputusan ujian sensitiviti kontras bagi orang normal yang dipadankan dengan umur telahpun ditunjukkan dalam banyak kajian. Sehingga kini, tiada kajian yang telah dilakukan di Malaysia untuk menunjukkan nilai normal bagi kanak-kanak dan orang dewasa dengan menggunakan carta Pelli-Robson. Dalam kajian ini, sensitiviti kontra Pelli-Robson telah diukur untuk 200 pemerhati normal dalam julat umur antara 4 hingga 30 tahun. Didapati bahawa kanak-kanak dalam lingkungan umur hingga 6 tahun mempunyai sensitiviti kontra yang lebih rendah secara bererti. Nilai sensitiviti kontra secara binokular yang didapati bagi kanak-kanak ini adalah sebanyak 1.69 ± 0.10 unit log berbanding dengan nilai min 1.82 unit log bagi subjek berumur antara 7 hingga 30 tahun.

RUJUKAN/REFERENCES

Arden, G.B. & Jacobsen, J. 1978. A simple grating test for contrast sensitivity: preliminary results indicate value for screening in glaucoma. Invest. Ophthalmol. and Vis Sci. 17: 23-32.

Arundale, K. 1978. An investigation into the variation of human contrast sensitivity with age and ocular pathology. Br. J. Ophthalmol. 62: 213-215.

Beazley, L.D., Illingworth, D.J., Jahn A. & Greer, D.V. 1980. Contrast sensitivity in children and adults. Br. J. Ophthalmol. 64: 863-866.

Bodis-Wollner, L. & Diamond, S.P. 1976. The measurement of spatial contrast sensitivity in cases of blurred vision associated with cerebral lesion. Brain. 99: 695-710.

Corwin, T.J. & Richman, J.E. 1986. Three clinical tests of the spatial contrast sensitivity function. A comparison. Am. J. Optom. and Physio. Optics. 63(6): 413-418.

Derefeldt, G., Lennerstrand, G. & Lundh, B. 1979. Age variations in normal contrast sensitivity. Acta Ophthalmol (Kbh), 57: 679-690.

Elliot, D., Sanderson, K. & Conkey, A. 1989. The reliability of the Pelli-Robson contrast sensitivity chart. Ophthalmol Physiol Opt. 10: 21-24.

Fiorentini, A. & Maffei, L. 1976. Spatial contrast sensitivity of myopic subjects. Vision Res. 16 : 438.

Fitzgerald, A. 1989. Contrast sensitivity in 200 normal school children aged 7 to 13 years. Aust. Orthoptic. J. 25: 10-16. 

Fitzgerald, A, Mitchell, J. & Munns, J. 1993. Pelli-Robson contrast sensitivity on 122 children aged six to twelve years. Aust. Orthoptic. J. 29: 40-45.

Frisen, L. & Sjostrand, J. 1979. Contrast sensitivity in optic neuritis; a preliminary report. Doc. Ophthalmol. Proc. 17: 165-173.

Harmon, L.D. 1973. The recognition of faces. Sci. Am. 229: 70.

Hess, R.F. & Howell, E.R 1977. The threshold contrast sensitivity function in strabismic amblyopia; evidence for a two type classification. Vision Res. 17: 1049-1056.

Hess, R.F. & Woo, G. 1978. Vision through cataracts. Invest. Ophthalmol. Vis. Sci. 17: 428-435.

Leibowitz, H., Post, R & Ginsburg, A.P. 1980. The role of fine detail in visually controlled behaviour. Invest. Ophthalmol. Vis. Sci. 19: 846.

Levi, D.M. & Harwerth, RS. 1977. Spatio temporal interactions in anisometropic and strabismic amblyopia. Invest. Ophthalmol. and Visual Sci. 16: 90-95.

Levi, D.M. & Harwerth, RS. 1980. Contrast sensitivity in amblyopia due to stimulus deprivation. Br. J. Ophthalmol. 64: 15-20.

McGrath, C. & Morrison, J.D. 1981. The effects of age on spatial frequency perception in human subjects. QJ Exp. Physiol. 66: 253-261.

Mitchell, D.F., Freeman, RD., Millodot, M., Haegerstrom, G. 1973. Meridional amblyopia: Evidence for modification of the human visual system by early visual experience. Vision Res. 23: 689-699.

Owsley, C., Sekuler, R, Siemens, D. 1983. Contrast sensitivity throughout adulthood. Vision Res. 23: 689-699.

Pelli, D., Robson, J. & Wilkins, A 1988. The design of a new letter chart for measuring contrast sensitivity. Clin. Visual Sci. 2: I: 187-199.

Ross, J.E., Clarke, D.D. & Bron, AJ. 1985. Effect of age on contrast sensitivity function: uniocular and binocular findings. Br. J. Ophthalmol. 69: 51-56.

Sekuler, R. & Hutman, L.P. 1980. Spatial vision and aging I. Contrast sensitivity. J. Gerontol. 35: 692-695.

Sjostrand, J. & Frisen, L. 1977. Contrast sensitivity in macula disease. Arch. Ophthalmol. 55: 507-514.

Skalka, H.W. 1980. Effect of aging on Arden grating acuity. Br. J. Ophthalmol. 64: 21-23.

Yates, J.T., Harrison, J.M., O'Connor, P.S. & Ballentine, C. 1987. Contrast sensitivity; characteristics of a large young adult population. Am. J. Optom. and Physiol Optics. 64(7): 519-527.