Khanduja Sumeet, Sampangi Raju, Hemlatha B C, Singh Satvir, Lall Ashish
Department of Ophthalmology, Kalpana Chawla Government Medical College, Karnal, Haryana, India.
Department of Ophthalmology, Netraspandana Eye Hospital, Bengaluru, Karnataka, India.
Indian J Ophthalmol. 2018 Jan;66(1):106-109. doi: 10.4103/ijo.IJO_511_17.
The purpose of this study is to describe the use of commercial digital single light reflex (DSLR) for vitreoretinal surgery recording and compare it to standard 3-chip charged coupling device (CCD) camera.
Simultaneous recording was done using Sony A7s2 camera and Sony high-definition 3-chip camera attached to each side of the microscope. The videos recorded from both the camera systems were edited and sequences of similar time frames were selected. Three sequences that selected for evaluation were (a) anterior segment surgery, (b) surgery under direct viewing system, and (c) surgery under indirect wide-angle viewing system. The videos of each sequence were evaluated and rated on a scale of 0-10 for color, contrast, and overall quality Results: Most results were rated either 8/10 or 9/10 for both the cameras. A noninferiority analysis by comparing mean scores of DSLR camera versus CCD camera was performed and P values were obtained. The mean scores of the two cameras were comparable for each other on all parameters assessed in the different videos except of color and contrast in posterior pole view and color on wide-angle view, which were rated significantly higher (better) in DSLR camera.
Commercial DSLRs are an affordable low-cost alternative for vitreoretinal surgery recording and may be used for documentation and teaching.
本研究旨在描述商用数码单反相机（DSLR）在玻璃体视网膜手术记录中的应用，并将其与标准的三芯片电荷耦合器件（CCD）相机进行比较。
使用连接在显微镜两侧的索尼A7s2相机和索尼高清三芯片相机同时进行记录。对两个相机系统记录的视频进行编辑，并选择相似时间帧的序列。选择用于评估的三个序列为：（a）眼前节手术，（b）直视系统下的手术，以及（c）间接广角观察系统下的手术。对每个序列的视频在颜色、对比度和整体质量方面进行评分，范围为0至10分。结果：两台相机的大多数结果评分均为8/10或9/10。通过比较DSLR相机与CCD相机的平均得分进行非劣效性分析，并获得P值。在不同视频中评估的所有参数上，两台相机的平均得分彼此相当，但在后极视图的颜色和对比度以及广角视图的颜色方面，DSLR相机的评分显著更高（更好）。
商用数码单反相机是玻璃体视网膜手术记录的一种经济实惠的低成本替代方案，可用于文档记录和教学。
