To perform optical coherence tomography imaging of retinal healing after conventional multicolor laser, pattern scanning laser, or micropulse laser treatment and compare the characteristics of each method.
This was a single-center interventional case series study. Twenty-nine patients with macular edema underwent laser photocoagulation. Changes of retinal morphology because of laser–tissue interaction were assessed within 3 months by using a spectral-domain optical coherence tomography.
Immediately after conventional multicolor laser or pattern scanning laser treatment, a hyperreflective band appeared at the laser sites. The photoreceptor inner segment–outer segment line disappeared in all the patients treated with a conventional multicolor laser, but was intact in 22.2% (2/9 eyes) after pattern scanning laser. From 1 week to 1 month, the bands resolved. At 3 months, recovery of the inner segment–outer segment line surrounding the laser site was seen in all patients after conventional grid photocoagulation and pattern scanning laser. Retinal morphology did not change at any time during the observation period after subthreshold micropulse diode laser photocoagulation.
The characteristic in vivo effects of retinal photocoagulation were monitored over time by spectral-domain optical coherence tomography. Changes of retinal morphology appeared less intense after pattern scanning laser than conventional grid laser treatment.
To perform spectral-domain optical coherence tomography imaging of retinal healing process after 3 types of laser photocoagulation were compared in patients with macular edema. Changes of retinal morphology appeared less intense after pattern scanning laser than conventional laser. Retinal morphology did not change at any time after subthreshold micropulse laser.
*Department of Ophthalmology, St. Luke's International Hospital, Akashi-cho, Chuo-ku, Tokyo, Japan
†Center for Clinical Epidemiology, St. Luke's Life Science Institute, Akashi-cho, Chuo-ku, Tokyo, Japan.
Reprint requests: Keiji Inagaki, MD, Department of Ophthalmology, St. Luke's International Hospital, 9-1, Akashi-cho, Chuo-ku, Tokyo 104-8560, Japan; e-mail: firstname.lastname@example.org
The authors declare no conflicts of interest.