Evaluation of visual deficits in different types of amblyopia at rural tertiary setup

  • Dr. Somya Dulani Professor, Bharat Ratna Late Shree Atal Bihari Vajpayee Memorial Medical College, Rajnandgaon, Chhattisgarh, India
  • Dr. Sachin Diagavane Professor, Jawaharlal Nehru Medical College Datta Meghe Institute of Medical Sciences (Deemed to be University), Wardha, Maharashtra, India
  • Dr. Anand Tibewal Professor, Jawaharlal Nehru Medical College Datta Meghe Institute of Medical Sciences (Deemed to be University), Wardha, Maharashtra, India
Keywords: Amblyopia, Anisometropic, Strabismic, Visual Acuity, Stereopsis


Introduction: Amblyopia is defined as unilateral or bilateral dimness of vision caused by form vision deprivation and/or abnormal binocular interaction, is the most common cause of preventable monocular blindness and nearly all-amblyopic visual loss is reversible with timely detection and appropriate intervention. The conditions leading to functional amblyopia are well known and include strabismus, anisometropia, astigmatism, hypermetropia, cataract, and other forms of stimulus deprivation.

Material &Method: The present hospital based cross sectional study has been carried out in Department of Ophthalmology at Acharya Vinoba Bhave Rural Hospital attached to Jawaharlal Nehru Medical College, Sawangi (Meghe), Wardha, a constituent of Datta Meghe Institute of Medical Sciences (Deemed University), Nagpur during the period from September 2012 to August 2014. 100 eyes of 91 patients having Amblyopia or amblyogenic factor (strabismus or anisometropia) in outdoor and indoor patients were selected for the study.All patients were enrolled in the study after due consideration of various exclusion criteria for selection.

Results: The mean age of the study population was 15.00 ± 5.74 years, range 6-30 year. The present study found amblyopia to be more common in males than females. All the patients included in this study had one of the diagnoses from strabismic amblyopia, anisometropic amblyopia, isometropic amblyopia and stimulus deprivation amblyopia. Out of these maximum number of eyes was found to have anisometropic amblyopia (37%) and strabismic amblyopia (36%). Maximum numbers of eyes were seen with0.9-1.0 visual acuity (in LogMAR units).It was found to be highly significant in almost all except between strabismic and stimulus deprivation amblyopia; and between anisometropic and isometropic amblyopia.The present study found colour vision to be normal in all the various types of amblyopia. Most eyes were found to have hyperopic astigmatism/hyperopia (56%) followed by myopic astigmatism/myopia (31%) while mixed astigmatism was least common (13%). Maximum numbers of eyes were seen with 0.00 – 0.15 contrast sensitivity. 43% had normal while 57% had abnormal stereopsis.

Conclusion: Amblyopia and associated strabismus can have devastating psychosocial and economic fallouts. Knowledge about the sub-types of amblyopia is important because the clinical presentations, management and outcomes of these different types are different. The data in the present study could be used to enhance screening efforts in an organized manner in those health-care groups which come in regular contact with infants and young children.


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Dadeya S, Khurana C. Diagnosis and Treatment of Childhood Amblyopia.AIOS CME series (No.18).

Von Noorden GK. Mechanism of amblyopia: Doc Ophthalmol.1977;34:93.

Vijayalakshmi P, Panadikar R. Classification of amblyopia. Strabisscope. 1996;3:6-7.

Repka MX, Lee KA, Melia M. American Academy of Ophthalmology amblyopia preferred practice pattern®. November 2017.

Janti SS, Raja AM, Matheen A, Charanya C, Pandurangan R. A cross sectional study on prevalence of amblyopia in school going children. J Evol Med Dent Sci. 2014;3(30):8561-8565. doi: 10.14260/jemds/2014/3086.

Scott WE, Kutschke PJ, Keech RV, Pfeifer WL, Nichols B, Zhang L. Amblyopia Treatment Outcomes. J AAPOS. 2005;9(2):107-111. doi: https://doi.org/10.1016/j.jaapos.2004.12.003.

Von Noorden GK. Classification of amblyopia. Am J Ophthalmol 1967;63(2):238-244. doi: https://doi.org/10.1016/0002-9394(67)91543-7.

Li S, Zou H, Wei C. Stereoscopic visual acuity in types of ametropic amblyopia in children. J Pediatr Ophthalmol Strabis. 2014;51(2):105-110. doi: https://doi.org/10.3928/01913913-20140220-04.

Menon V, Chaudhuri Z, Saxena R, Gill K, Sachdev MM. Profile of amblyopia in a hospital referral practice. Indian J Ophthalmol.2005;53(4):227-234. doi: 10.4103/0301-4738.18903.

Bradley A, Dahlman C, Switkes E, De Valois K. A comparison of color and luminance discrimination in amblyopia. Invest Ophthalmol Vis Sci.1986;27(9):1404-1419.

François J, Verriest G: La discrimination chromatique dans l'amblyopiestrabique. Doc Ophthalmol.1967; 23(1):318-323. doi:10.1007/BF02550754.

Roth A: Le senschromatique dans amblyopiefonctionelle. Doc. Ophthalmol.1968;24:113-200. doi:10.1007/BF02550949.

Lumbroso BD and Proto F: The anomalies of the sensor-chromaticone are subjected to biopsy with eccentric fixation. Eye Bulletin. 1963;42:699.

Marre M and Marre E: Color vision in squint amblyopia. Mod Probl Ophthalmol.1978;19:308-313.

Mullen KT, Sankeralli MJ, Hess RF. Color and luminance vision in human amblyopia: shifts in isoluminance, contrast sensitivity losses, and positional deficits. Vision Res.1996;36(5):645-653. doi:10.1016/0042-6989(95)00159-X.

Bonneh YS, Sagi D, Polat U. Local and non-local deficits in amblyopia: acuity and spatial interactions. Vision Res. 2004;44(27):3099-3110. doi: https://doi.org/10.1016/j.visres.2004.07.031.

Levi DM, Klein SA. Vernier acuity, crowding and amblyopia. Vision Res.1985;25(7):979-91. doi: https://doi.org/10.1016/0042-6989(85)90208-1.

Dorn L, Petrinović-Dorešić J. Stereoscopic visual acuity in different types of amblyopia. Acta clinica Croatica. 2007;46(1-Supplement 1):63-70.

Abrahamsson M, Sjöstrand J. Contrast sensitivity and acuity relationship in strabismic and anisometropic amblyopia. Br J Ophthalmol.1988;72(1):44-49. doi: 10.1136/bjo.72.1.44.

Fielder AR, Moseley MJ. Does stereopsis matter in humans? Eye.1996;10(2):233-238. doi:10.1038/eye.1996.51.

Joy S, Davis H, Buckley D. Is stereopsis linked to hand-eye coordination? Br Orthoptic J. 2001;58:38-41.

Jones RK, Lee DN. Why two eyes are better than one: the two views on binocular vision. J Exp Psychol.1981;7(1):30-40.

Murdoch JR, McGhee CN, Glover V. The relationship between stereopsis and fine manual dexterity: pilot study of a new instrument. Eye 1991;5(5):642-643. doi:10.1038/eye.1991.112.

Webber AL, Wood JM, Gole GA, Brown B. The effect of amblyopia on fine motor skills in children. Invest Ophthalmol Vis Sci.2008;49(2):594-603. doi: 10.1167/iovs.07-0869.

International Council of Ophthalmology. Visual Acuity Measurement Standard. Available at http://www.icoph.org/resources/47/Visual-Acuity-Measurement-Standard.html.

Woodruff G, Hiscox F, Thompson JR, Smith LK. Factors affecting the outcome of children treated for amblyopia. Eye. 1994;8(6):627-631. doi:10.1038/eye.1994.157.

DOI: 10.17511/jooo.2019.i08.05
Published: 2020-01-10
How to Cite
Dr. Somya Dulani, Diagavane, S., & Tibewal, A. (2020). Evaluation of visual deficits in different types of amblyopia at rural tertiary setup. Tropical Journal of Ophthalmology and Otolaryngology, 4(8), 478-487. https://doi.org/10.17511/jooo.2019.i08.05
Original Article