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Photomed Laser Surg. 2014 Mar;32(3):181-4. doi: 10.1089/pho.2013.3535. Epub 2014 Feb 14.

Low-level laser therapy improves vision in a patient with retinitis pigmentosa.

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1
1 University of Heidelberg , Otto Meyerhof Centre, Heidelberg, Germany .

Abstract

OBJECTIVE:

This case report describes the effects of low-level laser therapy (LLLT) in a single patient with retinitis pigmentosa (RP).

BACKGROUND DATA:

RP is a heritable disorder of the retina, which eventually leads to blindness. No therapy is currently available.

METHODS:

LLLT was applied using a continuous wave laser diode (780 nm, 10 mW average output at 292 Hz, 50% pulse modulation). The complete retina of eyes was irradiated through the conjunctiva for 40 sec (0.4 J, 0.333 W/cm2) two times per week for 2 weeks (1.6 J). A 55-year-old male patient with advanced RP was treated and followed for 7 years.

RESULTS:

The patient had complained of nyctalopia and decreasing vision. At first presentation, best visual acuity was 20/50 in each eye. Visual fields were reduced to a central residual of 5 degrees. Tritan-dyschromatopsy was found. Retinal potential was absent in electroretinography. Biomicroscopy showed optic nerve atrophy, and narrow retinal vessels with a typical pattern of retinal pigmentation. After four initial treatments of LLLT, visual acuity increased to 20/20 in each eye. Visual fields normalized except for a mid-peripheral absolute concentric scotoma. Five years after discontinuation of LLLT, a relapse was observed. LLLT was repeated (another four treatments) and restored the initial success. During the next 2 years, 17 additional treatments were performed on an "as needed" basis, to maintain the result.

CONCLUSIONS:

LLLT was shown to improve and maintain vision in a patient with RP, and may thereby have contributed to slowing down blindness.

PMID:
24527959
DOI:
10.1089/pho.2013.3535
[Indexed for MEDLINE]

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