A novel three-dimensional electric ophthalmotrope for improving the teaching of ocular movements

• Main Authors: Lei Xiong, Xiao-Yan Ding, Ya-Zhi Fan, Yao Xing, Xiao-Hui Zhang, Ting Li, Jian-Ming Wang, Feng Wang
• Format: Article
• Language: English
• Published: Press of International Journal of Ophthalmology (IJO PRESS) 2019-12-01
• Series: International Journal of Ophthalmology
• Subjects: extraocular muscles movement; ocular myopathy; medical education; ophthalmotrope; three-dimensional electric model
• Online Access: http://www.ijo.cn/en_publish/2019/12/20191212.pdf

AIM: To develop a novel three-dimensional (3D) electric ophthalmotrope to improve the ophthalmology teaching effectiveness and evaluate the teaching value. METHODS: A 3D electric ophthalmotrope was designed by simulating the movement of the ocular and the extraocular muscles according to Sherrington’s law. The model with joint bearing was to ensure the flexibility and centripetal rotation of the simulated ball and stepper motor as the driving device. A programmable processor was used to control the motion amplitude of the stepper motor. The size of hole was set at the back of the simulated shell to limit the amount of eye movement. Afterwards, using a 5-point Likert scale, 7 experts evaluated the 3D electric ophthalmotrope’s simulation ability and precision, compared with the traditional anatomical model. In addition, the teaching effectiveness of the 3D electric ophthalmotrope was evaluated at in-class quiz and final exam in a randomized controlled trial. RESULTS: The 3D electric ophthalmotrope could be operated easily to demonstrate the eye movements with motion of different ocular muscles. The experts agreed that the 3D electric ophthalmotrope was different from the traditional model and was easier for students to understand every extraocular muscles’ movement in each evaluation index (P<0.05). Moreover, the results of teaching effectiveness showed that the 3D electric ophthalmotrope were significantly greater than the traditional model both at in-class quiz (P<0.01) and final exam (P<0.05). CONCLUSION: This novel 3D electric ophthalmotrope is better than the traditional model, which can be to improve the ophthalmology teaching effectiveness for students to understand the extraocular muscles’ movement.