Saratov JOURNAL of Medical and Scientific Research

accommodation

Efect of FemtoLASIK on the condition of accomodation and vis-coelastic properties of the cornea in patients with myopic refraction

Year: 2019, volume 15 Issue: №2 Pages: 555-559
Heading: Ophtalmology Article type: Original article
Authors: Fokin V.P., Solodkova E.G., Kuznetsova O.S., Balalin S.V.
Organization: S. Fedorov Eye Microsurgery Federal State Institution, the Volgograd Branch
Summary:

The purpose is to study the efect of FemtoLASIK operation on the state of accommodation, intraocular pressure and viscoelastic properties of the cornea in patients with myopic refraction. Material and Methods. Examined 84 patients (84 eyes) with myopia degrees before and after the operation Femtolasik. Results. In patients with mild myopia after Femtolasik, there was a decrease in the coefcient of accommodation microfuctuation (CAM) by 3.6 % and an increase in the coefcient of accommodation response (CAR) by 28.6 %, in patients with moderate myopia there was a decrease in the values of CAM to 11.1 % and an increase in CAR to 30 %, in patients with myopia of high degree of CAM increased by 14.4 %, and CAR 34 %, respectively. The decrease in the values of corneal-compensated intraocular pressure (IОPcc) was statistically signifcant. In the frst group decrease IОPcc amounted to 17.1 % in the second group 17.3 %, in the third of 25.8 %. Conclusion. An improvement in the state of accommodation is observed against the background of a decrease in the indicators of corneal- compensated intraocular pressure after performing the operation FemtoLASIK.

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Study of the change in the volume of accommodation in students with visual load using Tonoref III (Nidek, Japan)

Year: 2018, volume 14 Issue: №4 Pages: 808-811
Heading: Ophtalmology Article type: Review
Authors: Hanova J.I., Nabiullin A.R., Avhadeeva S.R., Azamatova G.A.
Organization: Bashkir State Medical University of the Russian Health Care
Summary:

Purpose: to evaluate the volume of accommodation in students with the help of Tonoref III (Nidek, Japan) apparatus before and after the visual load, and also to identify the correlation of the volume of accommodation with the refraction indices and papilla size. Material and Methods. We investigated 204th year students of BSMU who passed the test of accommodation and refraction on the device Tonoref III (Nidek, Japan) 10 minutes before and immediately after a lecture. Results. We identified that the accumulative response after the exercise was weakened and clinical refraction was increased. The accommodation afterthe load was decreased. By reducing the amount of accommodation revealed an increase in the diameter of a pupil. Students with less severe refractive disorders showed a stronger increase in clinical refraction after exercise than students with moderate to high degrees of myopia. Conclusion. We concluded that the load reduces the absolute volum of accommodation, and this, in turn, leads to an increase in clinical refraction, dilated pupil and reduced visual acuity. Students with emmetropia and mild myopia are particularly susceptible to the above-mentioned changes.

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