Posters

Study of corneal astigmatism in children (about 258 cases)

Poster Details

First Author: E.Oumaima MOROCCO

Co Author(s): Z. Safae   L. Omar   B. Ahmed   C. Fouad   A. Meryem   B. Idriss     

Abstract Details

Purpose:

Astigmatism is a common refractive defect that affects visual acuity and contrast sensitivity. The refraction and its evolution are important to know in the child because the anomalies of the refraction must be precisely corrected. As its correction is more difficult than other ametropia, we propose in this study a statistical analysis of all epidemiological and topographic factors correlated with corneal astigmatism (toritis of the anterior and posterior corneal surface), The study of the prevalence of corneal astigmatism has curiously been relatively little studied.

Setting:

The study is made in Ophthalmology department at HASSAN II University Hospital, Fez, Morocco; SIDI MOHAMED BEN ABDELLAH University, Fez, Morocco.

Methods:

This is a retrospective study conducted in the Ophthalmology Department of Hassan II University Hospital in Fes, spread over a 6-year period 2013-2019. The age of our patients ranged between 4 and 16 years with an average of 11.9 years, sex ratio =0.8

Results:

The corneal astigmatism ranged between 0.1 and 5.5 with an average of 2, astigmatism of the anterior corneal face was on average 1.89 and posterior at 0.44. The average apex pachymetry was 534.6 μm The maximum keratometry was on average at 44.6 diop Univariate analysis showed a statistically significant correlation between corneal asphericity of the anterior corneal face and astigmatism of anterior corneal face (p <0.05). There is a statistically significant association between total corneal astigmatism and mean and maximum keratometry of the anterior corneal surface (P = 0.000)

Conclusions:

The study of the prevalence of corneal astigmatism has curiously been relatively little studied. A study was conducted from 1999 to 2004 of the US population : Astigmatism was found in 36.2% of cases, its frequency increases with age. In our series, hourglasses represent the most frequent topographical form, in particular the asymmetrical variety. Oval and especially round shapes are much rarer. We find, a significant correlation between the topographic form and the value of the corneal cylinder, as has been shown by previous studies.

Financial Disclosure:

None