Differential diagnostic of eye morphometric parameters in patients with refractive and axial myopia

Abstract

AbstractPurpose Many authors have shown that myopia is associated with changes in the anatomical parameters of the eye. The aim: To study morphometric parameters in patients with refractive and axial myopiaMethods The observation involved 264 patients (502 eyes) with varying degrees of myopia (myopic refraction of ‐2.75 diopters), age ‐ 18.41 year. Patients were divided by type of myopia: refractive (RM) ‐ 133 eyes, axial ‐ 217 eyes, mixed (SM) ‐ 91 eyes, and combined ‐ 61 eyes. Methods: visometry for distance, keratometry and refractometry after cycloplegia with cyclomed 1% with Accuref‐K 9001, Shin Nippon, the definition of the horizontal pupil diameter by keratotopograf PCT‐110, Optopol and horizontal corneal diameter by KR‐8900 Topcon and HRK‐7000 Huvitz.Results Results Analysis of the data showed that the axial myopia has significantly larger average diameter , the radius and refraction of cornea, pupil diameter , length of the vitreous humor, axis length of the eye and the degree of myopia, compared with refractive myopia. Significantly higher mean values of intraocular pressure and the width of the anterior chamber angle were established in refractive myopia in comparison with axial myopia (p <0,01). Values of anterior chamber depth and lens thickness between patients with axial and refractive myopia showed no significant differences (p> 0,1).Conclusion Obtained results showed that morphometric parameters of the eye, intraocular pressure in patients with axial and refractive myopia have practical value for early detection and prediction of the development and progression of myopia in patients with myopia