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LETTER TO EDITOR
Year : 2006  |  Volume : 54  |  Issue : 4  |  Page : 288

Anisometropic amblyopia and ocular parameters


Sion Eye Clinic and Microsurgery Centre, Laxmi Niwas, 3, B/18, Sion (W), Mumbai - 400 022, India

Correspondence Address:
Neela Patwardhan
Sion Eye Clinic and Microsurgery Centre, Laxmi Niwas, 3, B/18, Sion (W), Mumbai - 400 022
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0301-4738.27966

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How to cite this article:
Patwardhan N. Anisometropic amblyopia and ocular parameters. Indian J Ophthalmol 2006;54:288

How to cite this URL:
Patwardhan N. Anisometropic amblyopia and ocular parameters. Indian J Ophthalmol [serial online] 2006 [cited 2020 Dec 2];54:288. Available from: https://www.ijo.in/text.asp?2006/54/4/288/27966

Dear Editor,

A few observations on the article, "Evaluation of relationship of ocular parameters and the depth of anisometropic amblyopia with the degree of anisometropia"[1] are as follows:

1. It was interesting to read that "there was no case that could read only a few letters and not the entire line." In my experience, it is quite common to have patients reading partial lines in Snellen's test types. In fact, patients with amblyopia often read some Snellen's lines partially, such as 20/80p as well as 20/40p.

2. In my prospective amblyopia study of 14 years, 20% patients of anisometropic amblyopia have mixed astigmatism. Were mixed astigmatics excluded from this study?

3. 5.56% of patients in a clinical profile of amblyopia[2] present with meridional amblyopia.

How was the amount of anisometropia calculated in these patients?

Were the differences in axes taken into consideration while calculating the degree of anisometropia?

Townshend et al .[3] have calculated an index of anisometropia to give greater weight to asymmetric axes, thus improving on the root mean square calculation,[4] which does not measure the right-to-left asymmetry of the two eyes.

4. Although published data concludes that the depth of amblyopia corresponds to the degree of amblyopia and to the axial length of the eye in anisohypermetropes and anisomyopes, it would be enlightening to know the relationship of the amount of anisometropia and the depth of amblyopia with the ocular parameters such as keratometry and axial length in meridional amblyopia, especially mixed astigmatics!



 
  References Top

1.
Zaka-ur-Rab S. Evaluation of relationship of ocular parameters and depth of anisometropic amblyopia with the degree of anisometropia. Indian J Ophthalmol 2006;54:99-103.  Back to cited text no. 1
[PUBMED]  [FULLTEXT]  
2.
Menon V, Chaudhuri Z, Saxena R, Gill K, Sachdev MM. Profile of amblyopia in a hospital referral practice. Indian J Ophthalmol 2005;53:227-34.  Back to cited text no. 2
[PUBMED]  [FULLTEXT]  
3.
Townshend AM, Holmes JM, Evans LS. Depth of Anisometropic amblyopia and difference in refraction. Am J Ophthalmol 1993;116:431-6.  Back to cited text no. 3
[PUBMED]    
4.
Safir A, Kulikowski CA. Problems in the evaluation of data. Trans Sect Ophthalmol Am Acad Ophthalmol Otolaryngol 1975;79:OP488-92.  Back to cited text no. 4
[PUBMED]    




 

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