Aim: Comparison of accommodation amplitude values measured using autorefractometer, push up and minus lens technique.
Material and Method: In this randomized, prospective study, both eyes of 75 healthy individuals between the ages of 15 and 40 were included in the study. They were divided into 5 groups as 15-20 age group 1, 21-25 age group 2, 26-30 age group 3, 31-35 age group 4, 36-40 age group 5 To measure the accommodation amplitude, the minus lens and push up technique were used as subjective methods, and the autorefractometer Tonoref III was used as the objective. The correlation between the measurement methods and the reproducibility of the autorefractory measurements were evaluated. In addition, changes in accommodation measurements with age, gender and pupil diameter changes were investigated.
Results: The mean accommodation amplitude values were 4.86±1.73 D in the minus lens technique, 8.79±4.58 D in the push up technique, and 2.77±1.93 D in the autorefractometer measurement. Autorefractometer accommodation amplitude values were found to decrease significantly with age (p=0.000). It was seen that the correlation between autorefractometry and subjective methods, minus lens and push up was significant and correlated (p=0.000, r=0.47, p=0.001, r=0.28, respectively). Intraclass correlation coefficients of Tonoref III accommodation amplitude were found to be 0.935.
Conclusion: Objective accommodation amplitude measurements made using Tonoref III were found to be correlated with subjective methods, but lower values were detected compared to subjective methods.
Purpose: To compare the choroidal thickness parameters of patients with Crimean-Congo Hemorrhagic Fever (CCHF) and healthy subjects using spectral domain optical coherence tomography (SD-OCT).
Methods: In this study, right eye of 27 cases diagnosed with CCHF and 27 healthy subjects were evaluated. CCHF cases were evaluated after history of tick bite and hospitalization. Choroidal thickness was measured using EDI-OCT. Choroidal thickness was measured at five different points at the subfovea, temporal and nasal quadrants at 1000 μm intervals up to 2000 μm from the fovea. Choroidal vascular index (CVI) was defined as the ratio of luminal area (LA) to total choroidal area (TCA), including the total and 1500 μm center of the macula (CVItotal and CVI1500).
Result: Choroidal thickness in CCHF group was measured thicker in each quadrant than in the control group and the thickness in the subfoveal and nasal quadrants was significantly greater. TCA, stromal area (SA), LA were found to be significantly higher, but no significant difference was found between CVI and CVI1500.
Conclusion: Our findings suggest that the choroidal structure may be affected by CCHF disease.
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