Orthovoltage radiotherapy

A patient ocular interface, for assisting treatment of an ocular structure with radiotherapy, comprising:

• a holder that maintains an eye in a substantially fixed position during a treatment period;
• and
• a communication link that communicates information from the holder to an x-ray system, the information being indicative of a position of the eye during the treatment period, and the information determining, at least in part, a characteristic of an x-ray beam that is emitted from the x-ray system during the treatment period;
• wherein the characteristic of the x-ray beam comprises at least one of a trajectory of the x-ray beam, a beam on-time, an emit/not-emit status of the x-ray system, and a target on the sclera of the eye.

A patient ocular interface system, for treatment of an eye, comprising:

• a light source that emits light toward the eye during a treatment period;
• an eye holder, having an eye-contacting surface that engages an outer surface of the eye, the eye holder maintaining the eye in substantially a fixed position during the treatment period;
• and
• a sensor that provides an indication, to a radiotherapy system comprising an x-ray source, of a position of the eye during the treatment period;
• wherein the indication is based on the light, and wherein, when the indication is that the eye is not substantially in the fixed position, (i) the eye holder is configured to move the eye to be in substantially the fixed position, or (ii) the x-ray source is configured to move and to adjust a trajectory of the x-ray beam based on data from the sensor.

A patient ocular interface, for assisting treatment of an ocular structure with radiotherapy, comprising:

• means for holding an eye in a substantially fixed position during a treatment period;
• and
• means for communicating information from the means for holding to an x-ray system, the information being indicative of a position of the eye during the treatment period, and the information determining, at least in part, a characteristic of an x-ray beam that is emitted from the x-ray system during the treatment period;
• wherein the characteristic of the x-ray beam comprises at least one of a trajectory of the x-ray beam, a beam on-time, an emit/not-emit status of the x-ray system, and a target on the sclera of the eye.