Patent ID: 7229435

Claim:
An ophthalmic laser treatment apparatus which irradiates a laser beam to an affected part of a patient's eye to be treated, the apparatus including: a treatment mode selection switch which is used for selecting a treatment mode between a photocoagulation mode and at least one of a photodynamic therapy (PDT) mode and a transpupillary thermotherapy (TTT) mode; irradiation condition setting means for automatically setting a default value of an irradiation condition of the laser beam or setting a display to prompt input of a value of the irradiation condition based on the selected treatment mode, the default value being overwritten with the value used in a last treatment a first laser source which emits a first laser beam for photocoagulation; a first optical fiber which delivers the first laser beam emitted from the first laser source, wherein the first optical fiber has a first core diameter; a first light delivery optical system which irradiates the first laser beam delivered through the first optical fiber to the affected part and forms an image of an emission end surface of the first optical fiber on the affected part in a first spot size, wherein the first light delivery optical system includes a magnification changing optical system which changes the first spot size in a range of 50 μm to 1000 μm; a second laser source which emits a second laser beam for at least one of photodynamic therapy (PDT) and transpupillary thermotherapy (TTT), wherein the second laser source is independent from the first laser source; a second optical fiber which delivers the second laser beam emitted from the second laser source, wherein the second optical fiber has a second core diameter larger than the first core diameter of the first optical fiber; and a second light delivery optical system which irradiates the second laser beam delivered through the second optical fiber to the affected part and forms an image of an emission end surface of the second optical fiber on the affected part in a second spot size, wherein the second light delivery optical system includes the magnification changing optical system, common to the first light delivery optical system, which changes the second spot size in a range of 500 μm to 7000 μm.