Conn. Gen. Stat. § 45a-40: (Formerly Sec. 45-29g). Disability retirement.

(a) Any employee or judge of probate who has completed at least ten years of credited service shall be eligible for retirement and for a retirement allowance if he becomes permanently and totally disabled from engaging in any gainful employment in the service of the Court of Probate or in the office of judge, as the case may be. Such retirement allowance shall continue during the period of such disability. The existence and continuance of disability shall be determined by the Retirement Commission upon such medical evidence and other investigation as it requires.

(b) In order to obtain a retirement allowance under this section an employee or judge shall apply in writing for the allowance to the Retirement Commission within one year after incurring the disability, or by January 1, 1980, as to an employee or a judge becoming eligible on January 1, 1979. The allowance may be made retroactive to the first day of the month following the date on which the compensation of the disabled employee ceased or the disability of the judge commenced, except that for a judge or an employee who has completed at least ten years but less than twelve years of credited service and whose disability commenced before July 1, 1979, the allowance shall be retroactive to January 1, 1979, or the first day of the month after the commencement of such disability, whichever is later.