OPHTHALMOLOGIC APPARATUS

• Main Author: MORISHIMA SHUNICHI
• Format: Patent
• Language: English; Japanese
• Published: 02.03.2017
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

PROBLEM TO BE SOLVED: To provide an ophthalmologic apparatus capable of accurately measuring an intraocular distance of an eye to be examined.SOLUTION: An ophthalmologic apparatus includes an interference optical system, a first focusing lens, a second focusing lens, a focusing control part, and an intraocular distance calculation part. The interference optical system divides the light from a first light source into a reference light and a measurement light, irradiates the measurement light onto an eye to be examined, generates an interference light of the return light and the reference light, and detects the generated interference light. The first focusing lens can be moved along an optical path of the measurement light. The second focusing lens can be inserted in or removed from the optical path of the measurement light. The focusing control part at least controls the movement of the first focusing lens. The intraocular distance calculation part obtains a first intraocular distance based on first detection data of the interference light acquired by the interference optical system in a state that the second focusing lens is retracted from the optical path, and obtains a second intraocular distance based on second detection data of the interference light acquired by the interference optical system in a state that the second focusing lens is inserted in the optical path.SELECTED DRAWING: Figure 1 【課題】被検眼の眼内距離を高精度に測定することが可能な眼科装置を提供する。【解決手段】眼科装置は、干渉光学系と、第１合焦レンズと、第２合焦レンズと、合焦制御部と、眼内距離算出部とを含む。干渉光学系は、第１光源からの光を参照光と測定光とに分割し、測定光を被検眼に照射し、その戻り光と参照光との干渉光を生成し、生成された干渉光を検出する。第１合焦レンズは、測定光の光路に沿って移動可能である。第２合焦レンズは、測定光の光路に対して挿脱可能である。合焦制御部は、少なくとも第１合焦レンズの移動制御を行う。眼内距離算出部は、第２合焦レンズが光路から退避されている状態で干渉光学系により取得された干渉光の第１検出データに基づいて第１眼内距離を求め、第２合焦レンズが光路に挿入されている状態で干渉光学系により取得された干渉光の第２検出データに基づいて第２眼内距離を求める。【選択図】図１