Laser treatment apparatus

1. A laser treatment apparatus comprising:

a photographing system that photographs an eye;

an irradiation system that irradiates aiming light of a preset pattern and treatment laser light onto a fundus of the eye; and

a processor configured to:

determine an irradiation pattern of the treatment laser light by excluding at least a part of irradiation positions of the treatment laser light on the fundus from the preset pattern based on a front image of the eye acquired by the photographing system by photographing the eye on which the aiming light of the preset pattern is being irradiated,

analyze the acquired front image to specify projection images of the aiming light of the preset pattern in the acquired front image,

specify at least one difference between (1) an arrangement of the preset pattern and (2) an arrangement of the specified projection images of the aiming light of the preset pattern in the acquired front image of the eye on which the aiming light of the preset pattern is being irradiated,

determine the irradiation pattern by excluding at least a part, corresponding to the difference, from the preset pattern, and

control the irradiation system so as to irradiate the treatment laser light of the determined irradiation pattern.

2. The laser treatment apparatus of claim 1 , wherein the processor is configured to:

when the part excluded from the preset pattern includes a preset high-intensity irradiation position, set at least one new high-intensity irradiation position from among non-excluded irradiation positions, and

control the irradiation system so as to irradiate treatment laser light with higher intensity onto the new high-intensity irradiation position than other irradiation positions.

3. The laser treatment apparatus of claim 1 , wherein

the irradiation system comprises a scanner that changes irradiation positions of the treatment laser light on the fundus, and

the processor is configured to control the scanner based on the determined irradiation pattern.

4. The laser treatment apparatus of claim 1 , wherein

the irradiation system comprises a scanner that changes irradiation positions of the treatment laser light on the fundus, and a path switching part that switches a path of the treatment laser light to a first path led to the eye and a second path not led to the eye, and

the processor is configured to control, while controlling the scanner based on the preset pattern, the path switching part to switch the path of the treatment laser light to the second path synchronously with the control of the scanner corresponding to the part excluded from the preset pattern.

5. The laser treatment apparatus of claim 4 , wherein

the path switching part comprises a first reflecting member provided in the path of the treatment laser light and comprising a reflecting surface that reflects the treatment laser light, wherein orientation of the reflecting surface is variable, and

the processor is configured to change the orientation of the reflecting surface of the first reflecting member to switch the path of the treatment laser light.

6. The laser treatment apparatus of claim 1 , wherein

the irradiation system comprises a focusing lens that is movable along an optical axis thereof and used for changing sizes of projection spots of the treatment laser light on the fundus, and

the processor is configured to move the focusing lens based on the determined irradiation pattern.

7. The laser treatment apparatus of claim 1 , wherein

the irradiation system comprises a variable cross cylinder lens for correcting astigmatism of projection spots of the treatment laser light on the fundus, and

the processor is configured to move the variable cross cylinder lens based on the irradiation pattern determined by the irradiation-pattern determining part.

8. The laser treatment apparatus of claim 1 , wherein

the irradiation system comprises a second reflecting member comprising a reflecting surface that reflects the treatment laser light, wherein shape of the reflecting surface is variable, and

the processor is configured to change the shape of the reflecting surface of the second reflecting member based on the irradiation pattern determined by the irradiation-pattern determining part.

9. The laser treatment apparatus of claim 1 , wherein the processor is configured to perform notification based on the front image acquired by the photographing part.