Since first reported by Huang et al in 1991, 1 the optical coherence tomography (OCT) has become an essential diagnostic tool for monitoring patients with macular diseases and to evaluate the efficacy of treatment. Keywords: macular thickness, signal strength, Stratus OCT, fast map macular measurement, retinal thickness Insisting on higher signal strength may not be necessary. In general linear regression analysis, after accounting for age and gender, signal strength did not remain a significant predictor of thickness in any quadrant.Ĭonclusions: When using fast map macular measurements, a signal strength of 5 is clinically as efficient as a signal strength of 8 in measuring macular thickness in all quadrants. In the superior, nasal, inferior, and temporal quadrants, a signal strength of 8 demonstrated up to 3 µm thicker measurements than a signal strength of 5 ( P<0.05). There was no significant difference between the signal strength measurements obtained with different signal strengths in the central thickness ( P=0.20). Results: Overall 79 eyes of 42 patients with a mean age of 38.4☑2.4 were included. The OCT parameters included in the analysis were thickness in the central 1 mm and in the different quadrants in the 3-mm area. Each eye was imaged at least six times to acquire images with signal strengths of 4, 5, 6, 7, 8, and 9 out of 10 via adjustment of the focusing knob. The Stratus OCT fast macular thickness scan protocol was used and the macular thickness was measured with retinal thickness map analysis.
The age, gender, and eye (right vs left) of each subject were recorded.
Methods: In this prospective cross-sectional study 79 eyes of 42 healthy subjects were enrolled. Purpose: To examine the relationship between signal strength and macular thickness as measured by Stratus optical coherence tomography (OCT)’s fast macular thickness protocol in healthy subjects. Ori Segal, 1 Yinon Shapira, 2 Assaf Gershoni, 1 Igor Vainer, 2 Arie Y Nemet, 1 Noa Geffen, 1 Michael Mimouni 2ġDepartment of Ophthalmology, Meir Medical Center, Kfar Saba, Israel and the Sackler School of Medicine, Tel Aviv University, Tel Aviv, 2Department of Ophthalmology, Rambam Health Care Campus, Haifa, Israel
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