Posters

Refraction indicators in children with pseudophakia with a predisposition for myopia

Poster Details

First Author: D.Narzullaeva UZBEKISTAN

Co Author(s):                        

Abstract Details

Purpose:

Analysis of refractive indexes in children predisposed to myopia after extraction of congenital cataracts (CC) with IOL implantation.

Setting:

Pediatric cataract affects around 200,000 children worldwide, with an estimated prevalence ranging from three to six per 10,000 live births.Children exhibit a tendency for myopic shift due to the anatomical differences from adult eyes and due to the growth of eyeball.

Methods:

The results of a study of refraction in 62 (82 eyes) patients with congenital cataract aged 7 months to 12 years are presented.They were divided into 3 groups.Refractive indices were studied after 3 years.Risk factors for the development of myopia included: hereditary burden, parameters of the axial length of the eyeball, radial correlation of the cornea of ​​the axial length of the eye, refractive index and anterior- posterior axis of a paired healthy eye in a unilateral process. The refractive power of the IOL was calculated using the SRK II formula taking into account age-related hypocorrection.

Results:

In group I, 37.5% had mild and high myopia from (-) 0.5 to (-) 6.5 diopters. In group II, myopia was from (-) 1.0 to (-) 6.25 diopters in 30.0%, and in group III, myopia was found in 25.0% of a low degree. Refractogenesis in case of pseudophakia, both in the risk group and without it, was characterized by an increase in refraction. At the same time, myopia and, inappropriate to age, emmetropia were more often manifested in children with a predisposition to myopia (70.2%). Abnormal refractive changes could be a manifestation of an inadequately selected optical power of the IOL, which is associated with its calculation according to a single formula to all children with and without risk of abnormal refractogenesis. Moreover, the features of biometric parameters of the eyes of patients in the risk group were not fully taken into account. The high frequency of unplanned refraction in children with pseudophakia with a predisposition to abnormal refractogenesis may be due to the presence of both obturative and refractive amblyopia.

Conclusions:

In children at risk of developing abnormal refractogenesis, it is advisable to introduce a correcting factor in the IOL strength calculation formula for correcting residual refraction and treating amblyopia.

Financial Disclosure:

None