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Gabriela A. Pellegrini, Arnaldo F. Bordon, Mariana Harasawa, Luiz F. Queiroz, Analisa Raskin, Gabriel A. Carlos, Janaina C. Souza, Camile F. Tonin; Evaluation Of The Vitreomacular Adherence In Patients With High Myopia Using Ocular Ultrasound And Optical Coherence Tomography: A Comparative Analysis. Invest. Ophthalmol. Vis. Sci. 2011;52(14):2706.
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To evaluate posterior hyaloid membrane and its adherence in macular area in patients with high myopia using ultrasound (US) and optical coherence tomography (OCT).
Prospective study involving patients with high myopia.Inclusion criteria were: age of 18 years or older, axial length equal or greater than to 27 mm measured and spherical equivalent equal or greater than - 6.00 diopters, and visual acuity equal or better than 20/40.Exclusion criteria were: patients with previous retinal detachment surgery, either pars plana vitrectomy or scleral buckling cataract surgery and media opacity. Axial length was measured using the IOL Master. Ultrasound was done using the probe of 10 MHz(Alcon Ultrascan). OCT was performed using the Stratus. A complete ophthalmological examination was performed in every patient.
Thirteen eyes of seven patients were examined. The average age was 42 years-old (range, 30 to 57 years-old). Fifty percent were female. The average spherical equivalent was -13.87 diopters (-9,25D to -19,25D). The axial diameter ranged from 30.7 to 36.1 mm.The US exam showed total posterior hyaloid detachment in six eyes, partial detachment without macular traction in two eyes, and in the remaining eyes no membranes were observed.Of those eyes which the US showed partial detachment, the OCT revealed only evidence of posterior hyaloid adhesion in the macular region with foveoschisis in one eye. In the others twelve eyes no membrane was identified.
The ocular ultrasound was more effective to evaluate the posterior hyaloid detachment and its type (total or partial) than OCT.The OCT was more effective to show small changes and small adherences in macular area.
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