| Manual Lensmeter of internall reading This device is suitable to test the diopters of spherical lenses of ophthalmic lens or cylindrical lens, diopter, axis(axle) of astigmatism of cylindrical lens, diopter of the prism and diopter of the cornea - contact lens Characteristics : The ocular one is provided with a unit of approach which range of approach is of + 5D to be adapted to the different visions of the different operators. The retcle is divided with the scale of measurement and the dividing disc of the degree of the prism. The entire degree of the prism is read directly of the scale of measurement and of the decimal scale estimated according to the degree on the scale of measurement. When prism diopter is great than 5^ , use of prism compensator is necessary. There are 2 scale line on the prism compensator: the upper line denotes angle, with the range of 0º - 180º, minimum scale value of 5º; the lower line is the prism diopter with a range of 15^ - 0 - 15^ Specifications : Ranges of measurement of diopters: 0 to +25D Minimal value of the scale: 0,125D at 0 to + 5D 0,25D at + 5D to + 25D Axis of the astigmatism of the cylindrical lens: 0° - 180° Diopter of the prism: 0 - 5 ∆ Angle bases of the prism: 0° - 180° Regulator of the ocular visibility: + 5D Size of the lens: - 16mm a - 80mm Total dimensions of the device: 275mm x 130mm x 455mm Weight: 5,6 Kg Power: 220V - 110V / 15W |