| US 7,597,445 B2 | ||
| Program for optometry, recording medium and subjective optometric apparatus having the optometric program, and optometric method | ||
| Tomohiro Sakurada, Tokyo (Japan); and Tatsuro Yokoi, Tokyo (Japan) | ||
| Assigned to Kabushiki Kaisha TOPCON, Tokyo (Japan) | ||
| Filed on Mar. 21, 2007, as Appl. No. 11/726,067. | ||
| Claims priority of application No. 2006-100239 (JP), filed on Mar. 31, 2006. | ||
| Prior Publication US 2007/0229762 A1, Oct. 04, 2007 | ||
| Int. Cl. A61B 3/02 (2006.01) | ||
| U.S. Cl. 351—243 [351/222] | 13 Claims |
| 1. A recording medium having a program for optometry, which is used for a control device, the program comprising:
a first unit to measure an amount of heterophoria of eyes of an examinee to be examined and determine whether exophoria or
esophoria exists in a horizontal heterophoria examination;
a second unit to calculate a Sheard criterion value based on the measured amount of heterophoria of the eyes of the examinee
and cause the display of an operating method to allow the examinee to implement a Sheard criterion identifying examination
by use of the calculated Sheard criterion value on a display device;
a third unit to allow the examinee
to implement a convergent test of the eyes without implementing a divergent test of the eyes in a case where the exophoria
exists and to implement a divergent test of the eyes without implementing a convergent test of the eyes in a case where the
esophoria exists based on the operating method, and
to complete the convergent or divergent test if a fusional convergence or divergence reserve of the eyes satisfies a Sheard
criterion based on the Sheard criterion value and to measure the fusional convergence or divergence reserve of the eyes if
the fusional convergence or divergence reserve of the eyes does not satisfy the Sheard criterion based on the Sheard criterion
value; and
a fourth unit to calculate a prism amount for prescriptions based on the heterophoria amount and the fusional convergence
reserve of the eye in the case where the exophoria exists or the fusional divergence reserve of the eyes in the case where
the esophoria exists, if the fusional convergence or divergence reserve of the eyes does not satisfy the Sheard criterion.
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