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T. Kameda, T. Tanabe, M. Hangai, T. Ojima, N. Yoshimura; Changes of Retinal Sensitivity and Fixation Patterns After Glaucoma Surgery in Advanced Stage Glaucoma by Micro Perimeter 1. Invest. Ophthalmol. Vis. Sci. 2007;48(13):1610.
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© ARVO (1962-2015); The Authors (2016-present)
To investigate changes of retinal sensitivity adjacent to fixation points and fixation patterns after glaucoma surgery in advanced stage glaucoma by Micro Perimeter 1 (MP-1).
Fourteen eyes of twelve patients of advanced stage glaucoma (defined as the presence on Humphrey Field Analyzer (HFA) 30-2 of 0dB in one or more of the four innermost central points and a mean deviation (MD) of -12dB or worse in HFA10-2) which underwent glaucoma surgery were enrolled in this study. Before and 3 to 6 months after glaucoma surgery, best corrected visual acuity (BCVA) examination was conducted, and also the retinal sensitivity within central 5 degrees (40 points) and fixation patterns (stability and location) were assessed by Macula 10 degree program of MP-1.
There was no significant difference between preoperative and postoperative BCVA (0.11±0.37 and 0.13±0.31 in logMAR, respectively. P=0.22). The mean sensitivity of central 5 degrees after surgery also showed no significant change compared to the mean sensitivity before surgery (8.10 dB and 7.54 dB, respectively. P=0.078). However, in 11/14 eyes postoperatively, localized changes in retinal sensitivity were observed. Regarding fixation patterns, 4/14 eyes showed improvement in stability while 1/14 eye got worse after surgery. Four of 14 eyes demonstrated the shift of the fixation location after surgery toward the fovea.
MP-1 efficiently revealed the changes in patterns of retinal sensitivity and fixation, which contributed to the evaluation of functional changes before and after glaucoma surgery.
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