Stock Photo: OPHTHALMOLOGY, CHILD. OPHTHALMOLOGY, CHILD Photo essay in doctor´s office. Follow_up visit at the ophthalmologist. 8_year_old girl. Ophtalmologic examination with an automatic refractometer keratometer Nidek ARK_730A. The refractometer enables to measure the refraction of the patient´s eye, and then estimate the optic defects myopia, hyperopia, astigmatism, presbypia. The keratometer measures the radius of curvature of the cornea, and so the possible astigmatism.