Ocular refractive power measuring instrument

Abstract

The invention provides a complex machine which avoids increasing in size and becoming expensive as compared with conventional ocular refractive power measuring instruments and which combines in a single unit both functions for ocular refractive power measurement and ocular adjustment function measurement, thereby contributing to operator's convenience in handling even when the type of measurement changes. A measurement type selecting switch (30) is provided for selecting at least two types of measurement: ordinary refractive power measurement including measurement of spherical degree, astigmatism, and astigmatism axis, for eyes to be tested, and ocular adjustment function measurement for finding a change in refractive power in high frequency wave component for eyes to be tested. A refractive power measuring section (40) is a plural meridian ocular refractive power measuring section capable of measuring ocular refractive power in a plurality of meridian directions; in the case where ordinary refractive power measurement is to be made, ocular refractive power measurement is made in at least two meridian directions. Further, in the case where ocular adjustment function state measurement is to be made, refractive power measurement is made in a certain determined meridian direction.

Description

technical field [0001] The present invention relates to an eye refractive power measuring device for measuring the eye refractive power of an eye to be inspected and measuring the state of the eye accommodation function of the eye to be inspected. Background technique [0002] Conventionally, refractive power measuring devices for measuring eye refractive power have been widely used in various medical fields including ophthalmology. For example, such as the refractive power measurement device described in Patent Document 1 or Patent Document 2, is a refractive power measurement device using a retinoscopy method or the like. On the other hand, in various medical sites including ophthalmology, as a more detailed refractive state, it is more and more desirable to measure the state of the accommodation function of the eye (the state of the eye accommodation function), for example, the state of the eye accommodation function as described in Patent Document 3...

AI Technical Summary

Problems solved by technology

Therefore, there are problems such as increasing the size of the motor in order to increase the speed of the motor, increasing the rigidity of the device for continuous rotation, and requiring a high-speed processing circuit for high-speed measurement processing to be larger and more expensive than conventional devices. of

[0009] In addition, in the case of making a complex machine, there is also the following problem: if the conventional refractive power measurement speed is too fast to match with the eye adjustment function state measurement device, it will be difficult to see the display, and it is difficult to handle because of the high speed.

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