# Vitreoretinal Surgery Unit, Eye and Ear Hospital Keywords: - [Oak Hospital](< /en/search?q=Oak Hospital >) - [eye diseases](< /en/search?q=eye diseases >) - [surgery](< /en/search?q=surgery >) At the Vitreoretinal Surgery Outpatient Clinic in Oak Hospital, we treat patients who need surgery to the posterior segment of the eye; the vitreous or the retina. You need a physician's referral for treatment and examinations with us. ## [ Maisa Portal (opens in new window, links to another website) ](https://www.maisa.fi/maisa/Authentication/Login?lang=britishenglish) maisa.fi Maisa is a digital patient service where you can manage your health matters online. When your care begins, we’ll tell you which services are available to you. In Maisa, you can view your records, book appointments and message your care unit. Click to Maisa  ## [ 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 Paciuksenkatu 8 Helsinki Building A, 3rd floor #### Postal address PL 225 00029 HUS ### Contact center for eye diseases We have a callback service. [ Phone, Contact center for eye diseases: 09 471 73400 ]()telephone hours: Mon–Fri 7:30–16:00 ### Fax [ Phone, Fax: 09 471 75147 ]() Register at entrance A on the 2nd 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 ### [ Petri Aaltonen ](/en/person/petri-aaltonen) Specialist Head and Neck Center, Eye Diseases ### [ Teija Pirhonen ](/en/person/teija-pirhonen) Nurse Manager Head and Neck Center, Eye Diseases Updated: 11.09.2025 Print this page