Mire pattern for the keratometer and method of measurement of corneal curvature by using this mire pattern

摘要

The present invention relates to a Meyer circular pattern used in the corneal curvature measuring apparatus for measuring a corneal curvature of the eye of the subject Anja relates to a corneal measurement method using Meyer pattern and this for corneal curvature measuring apparatus, wherein the Mayer pattern 10 has the same radius and two division number 12 (14), two of the call the center point of the divided partition formed to be symmetrical on both sides in a straight line passing through the center of the jidoe made circular with a constant thickness circle corneal curvature measuring apparatus is Myers pattern, the Meyer pattern 10 made of identification marks 20 and 21 formed between the two sides split arc provided in the direction in which the symmetrical around the center of the circle at the position having the such that the Meyer pattern irradiated to the eye of the subject by using the Anja, and expression in both side image of the pattern reflected on the eye of the subject Meyer Anja Marks 20 and 21 the center point (k) (k ') for connecting to each other by drawing a straight line to find the center point of the straight line to determine the center point of the straight line as the center point of the Meyer pattern inspected Anja of both identification mark searching the center point, the the present invention relates to the corneal curvature measurement method for measuring the curvature of the cornea.