PROBLEM TO BE SOLVED: To provide an ophthalmic apparatus capable of reliably protecting an eye to be inspected from an optical hazard and a method of operating the ophthalmic apparatus. An irradiation system that irradiates an eye to be inspected with light emitted from a light source, and a light intensity detection system that receives at least a part of the light emitted from the light source and detects the intensity of the light. When the light intensity can be changed, a light intensity detection system that detects the light intensity at least every time the light intensity is changed, and an irradiation that continuously measures the integrated irradiation time of the light to the eye to be inspected. It is provided with a time measuring unit and an irradiation light amount estimation unit that continuously estimates the irradiation light amount of the light irradiated to the eye to be inspected based on the detection result of the light intensity detection system and the measurement result of the irradiation time measuring unit. [Selection diagram] Fig. 5【課題】被検眼を光ハザードから確実に保護することができる眼科装置及びその作動方法を提供する。【解決手段】光源から出射された光を被検眼へ照射する照射系と、光源から出射された光の少なくとも一部を受光して光の強度を検出する光強度検出系であって、且つ光源が光の強度を変更可能である場合には少なくとも光の強度が変更されるごとに光の強度の検出を行う光強度検出系と、被検眼に対する光の積算照射時間を継続的に測定する照射時間測定部と、光強度検出系の検出結果と照射時間測定部の測定結果とに基づき、被検眼に照射される光の照射光量を継続的に推定する照射光量推定部と、を備える。【選択図】図５
