Petitioner, a fireman, sought retirement for accident disability. His disability is not in dispute but the cause of it is. Petitioner claims it is due to a heart condition. Concededly if that is the cause of petitioner's condition there is a rebuttable presumption that it was of accidental origin (General Municipal Law, 207-k). Petitioner has been extensively examined, with medical conclusions ranging all the way from arteriosclerotic coronary artery disease to no physical disability at all. The final determination reached on November 18, 1971, was that petitioner was not suffering from any organic heart disease but from a neurosis, and his retirement was directed. The court does not make a medical determination and if there is substantial medical evidence to support the board's determination, evidence to the contrary cannot be considered. We therefore accept the board's finding. However, the finding does not meet petitioner's application (which was to be retired for an accidental injury suffered in line of duty) unless it be concluded that a disabling neurosis cannot be the consequence of an accident suffered in line of duty. The matter is remanded to the board for further findings in that respect.