Fundus blood flow metering method
First Claim
1. A method for measuring the blood flow of a fundus blood vessel on an eye to be examined, by irradiating the blood vessel with a light beam, detecting scattered and reflected light from the irradiated vessel, and calculating the velocity of the blood flow based on the detection, said method comprising the steps of:
- executing a first measurement of the blood flow while irradiating the blood vessel with a light beam from a first direction;
carrying out alignment related to the eye after executing the first measurement in said first measurement executing step;
allowing an operator to confirm the alignment state and awaiting the operator'"'"'s order; and
executing a second measurement of the blood flow, based on the operator'"'"'s order, while irradiating the blood vessel with a light beam from a second direction different from the first direction.
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Accused Products
Abstract
A fundus blood flow metering method includes a series of steps of carrying out alignment of the positional relation with an eye to be examined, carrying out aiming of a blood vessel to be measured, and measuring a velocity of blood flow while tracking the blood vessel so as to track and capture eye movement. After the sequential operation, the direction of incidence of a measuring beam is switched to another direction and the series of steps are again carried out for the same blood vessel, starting from the alignment.
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Citations
11 Claims
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1. A method for measuring the blood flow of a fundus blood vessel on an eye to be examined, by irradiating the blood vessel with a light beam, detecting scattered and reflected light from the irradiated vessel, and calculating the velocity of the blood flow based on the detection, said method comprising the steps of:
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executing a first measurement of the blood flow while irradiating the blood vessel with a light beam from a first direction;
carrying out alignment related to the eye after executing the first measurement in said first measurement executing step;
allowing an operator to confirm the alignment state and awaiting the operator'"'"'s order; and
executing a second measurement of the blood flow, based on the operator'"'"'s order, while irradiating the blood vessel with a light beam from a second direction different from the first direction. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for measuring a fundus blood vessel on an eye to be examined comprising:
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an irradiation system having a light source, for irradiating the blood vessel with a light beam;
a detection system having detectors for detecting scattered and reflected light from the irradiated vessel;
an operation device allowing an operator to order measurement; and
a controller configured to;
execute a first measurement of the blood flow while controlling said irradiation system to irradiate the blood vessel with a light beam from a first direction;
carry out alignment related to the eye after the first measurement;
await an operator'"'"'s order with said operation device; and
execute a second measurement of the blood flow, based on the operator'"'"'s order with said operation device, while controlling said irradiation system to irradiate the blood vessel with a light beam from a second direction different from the first direction. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification