Scheimpflug registration of the accommodation response in young patients with emmetropia, myopia, pigment dispersion syndrome, juvenile glaucoma

Session Details

Session Title: Anterior Segment Imaging II

Session Date/Time: Tuesday 25/09/2018 | 08:00-10:30

Paper Time: 09:38

Venue: Room A4

First Author: : O.Rozanova RUSSIA

Co Author(s): :    T. Iureva                    

Abstract Details

Purpose:

To analyze the Scheimpflug registration potential of the accommodation response in normal eyes and in patients with myopia, pigment dispersion syndrome and juvenile glaucoma.

Setting:

S. Fyodorov Eye Microsurgery Federal State Institution, Irkutsk, Russia

Methods:

Four groups of young patients (18-30 years) were examined: with emmetropia and ophthalmopathology absence (n=30), with myopia (n=30), with pigment dispersion syndrome (n=18), with early stage of juvenile glaucoma (n=2). The state of the physiological optical system in different focus conditions was analyzed in all patients. The study of the anterior segment of the eyes was performed using a rotational Scheimpflug camera Pentacam HR (algorithm with the target refraction changing from +2.0 D to -5.0 D).

Results:

The normal accommodation response was accompanied by lenticular cortical density increase, irido-corneal angle increase, corneal asphericity increase, significant pupil constriction and changing of the iris profile. In patients with myopia, pigment dispersion syndrome and juvenile glaucoma the transformation of the lens and extralenticular structures at the moment of accommodation response was less pronounced than in normal eyes, without significant changes in corneal asphericity. The pupil response was less than in emmetropes: in patients with myopia by 12-15% (p<0.001), in patients with pigment dispersion syndrome by 25-35% (p<0.001), in patients with juvenile glaucoma by 55-60% (p<0.001).

Conclusions:

Scheimpflug registration of the accommodation response revealed the significant differences in the accommodation system functional state in normal eyes and in patients with myopia, pigment dispersion syndrome and juvenile glaucoma. Functional weakness of the pupillary response in different focus conditions was defined in patients with a pigment dispersion syndrome and juvenile glaucoma, thus it could be an important pathogenetic factor of the disease.

Financial Disclosure:

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