The changes of anatomic and topographic characteristics of eye anterior segment after uncomplicated cataract phacoemulsification

Abstract

Aim. To study the changes of anatomic and topographic characteristics of the eye anterior segment after uncomplicated cataract phacoemulsification using corneal incision with intraocular soft lens implantation. Methods. The data of ultrasound biomicroscopy and noncontact tonometry of 58 eyes (56 patients, 32 females, 24 males aged 54 to 78 years) before and after cataract phacoemulsification were analyzed. Paitents with survived ocular trauma, refractive keratoplasty, glaucoma, uveitis, and surgical complications (incomplete capsulorrhexis, posterior capsule rupture, ciliary zonule disinsertion, corneal burn). Apart from the common examinations (visual acuity testing, tonometry, tonography, eye A- and B-ultrasonography, biomicroscopy), all patients underwent eye ultrasound biomicroscopy. Results. Anterior chamber depth increased from 2.73±0.10 to 4.17±0.06 mm (p ≤0.001). Trabecula-iris distance measured at 500 μm from the scleral spur, increased from 0.38±0.02 to 0.47±0.02 mm (p ≤0.001). Anterior chamber angle increased from 28.69±1.87 to 42.73±1.56 degrees (p ≤0.001), the angle between the iris and the sclera increased from 32.78±1.39 to 41.36±0.84 degrees (p ≤0.001), the angle between the sclera and ciliary processes increased from 39.48±1.29 to 45.30±1.16 degrees (p ≤0.001). Intraocular pressure according to the non-contact tonometry data decreased from 18.16±1.29 to 13.55±0.95 mm Hg (p ≤0.001). Conclusion. Anterior chamber depth, trabecula-iris distance, anterior chamber angle, the angle between sclera and iris and the angle between sclera and ciliary processes increased significantly after phacoemulsification with intraocular lens implantation. Intraocular pressure decreased significantly according to the non-contact tonometry data.

Keywords

ultrasound biomicroscopy / cataract phacoemulsification / anterior chamber depth / intraocular pressure

References

[1] Егорова Э.В., Файзиева У.С. Факоэмульсификация хрусталика при остаточном закрытии угла передней камеры после лазерной иридэктомии у пациентов Узбекистана с первичной закрытоугольной глаукомой // Бюлл. РАМН. - 2009. - Т. 4, №138. - C. 16-21.

[2] Правосудова М.М., Балашевич Л.И. Возможности операции факоэмульсификации в лечении больных с закрытоугольной глаукомой / Современные технологии катарактальной и рефракционной хирургии. - М., 2008. - C. 206-210.

[3] Тахчиди Х.П., Егорова Э.В., Узунян Д.Г. Ультразвуковая биомикроскопия в диагностике патологии переднего сегмента глаза. - М.: Издательский центр «Микрохирургия глаза», 2007. - 126 c.

[4] Huang G., Gonzalez E., Peng P.H. et al. Anterior chamber depth, iridocorneal angle width, and intraocular pressure changes after phacoemulsification: narrow vs open iridocorneal angles // Arch. Ophthalmol. - 2011. - Vol. 129, N 10. - P. 1283-1290.

[5] Pereira F.A., Cronemberger S. Ultrasound biomicroscopic study of anterior segment changes after phacoemulsification and foldable intraocular lens implantation // Ophthalmology. - 2003. - Vol. 110, N 9. - P. 1799-1806.

[6] Simsek A., Siftci S. Evaluation of ultrasonic biomicroscopy results in anterior eye segment before and after cataract surgery // Clin. Ophthalmol. - 2012. - Vol. 6. - P. 1931-1934.

[7] Yang H.S., Lee J., Choi S. Ocular biometric parameters associated with intraocular pressure reduction after cataract surgery in normal eyes // Am. J. Ophthalmol. - 2013. - Vol. 156, N 1. - P. 89-94.

RIGHTS & PERMISSIONS

Ryabtseva A.A., Yugaj M.P., Nikitina N.S.