# Eye Diseases Surgery Unit Lehti, Oak Hospital Keywords: - [Oak Hospital](< /en/search?q=Oak Hospital >) - [eye diseases](< /en/search?q=eye diseases >) In Eye Diseases Surgery Unit Lehti in Oak Hospital, we perform ambulatory eye surgery, such as cataract surgery. After a short recovery period, you will be able to go home on the same day. You need a physician’s referral for examination in our unit. ## [ Maisa Portal (opens in new window, links to another website) ](https://www.maisa.fi/maisa/Authentication/Login?lang=britishenglish) maisa.fi You can use our online services by signing in to the Maisa Portal. Once your treatment with us begins, you will receive information on the services you can access in Maisa. These include appointment booking and preliminary information forms, for example. Click here to go to Maisa's sign-in page  ## [ Patient Guide ](/en/patient/patient-guide) The Patient Guide site answers the most common questions patients may have before, during, and after treatment. See Patient Guide site here  ## Contact information and opening hours #### Visiting address Oak Hospital Zaidankatu 2 Helsinki #### Postal address P.O. Box 225 00029 HUS ### Telephone helpline for eye diseases We have a callback service. [ Phone, Telephone helpline for eye diseases: 09 471 73400 ]()telephone hours: Mon–Fri 7:30–16:00 Register at entrance B on the 1st floor. ## Find us here ### [ Oak Hospital ](/en/patient/hospitals-and-other-units/oak-hospital)  ## Unit's services ### [ Eye diseases ](/en/patient/treatments-and-examinations/eye-diseases)  ## Specialists ### [ Risto Nieminen ](/en/person/risto-nieminen) Deputy Chief Physician Head and Neck Center, Eye Diseases ### [ Satu Rantahakala ](/en/person/satu-rantahakala) Nurse Manager Head and Neck Center, Eye Diseases Updated: 11.09.2025 Print this page