| 摘要 |
PURPOSE:To execute quickly and exactly an eyesight inspection by setting the diameter of an eye-examining test lens fixed temporarily to an eye examining test frame to about 45mm. and also installing an annular rim of absorbing magnetism or absorbed magnetism. CONSTITUTION:A lens body 11 has a diameter of about 45mm., and an annular rim 12 consisting of a magnetic material is installed to the circumferential part. The lens body 11 is made installable to an eye examining test frame 14 so that a distance between an optical center O1 of the lens body 11 and the cornea top O2 a person whose eye is examined becomes about 12mm., and as for a view angle theta, a wide angle lens of about 110-120 deg. is formed. The test frame 14 has permanent magnets 19a-19c in three parts, the annular rim of the lens body 11 is stuck by absorbing magnetism, and also two containing parts 15 of the lens body 11 are provided by bringing them close to each other in front and rear so that two kinds of lenses can be attached simultaneously. In this way, the lens is turned and fixed at an optional position, and by a wide field of view, an eye examination work such as a simultaneous examination of a perspective composite focus lens, a simultaneous examination of astigmatism and presbyopia, etc. is executed quickly and exactly. |
