Under the auspices of the President of Al-Mustaqbal University, Professor Dr. Hassan Shaker Magdy, the esteemed, and in order to achieve the third goal of sustainable development goals (good health and well-being), the teaching assistant in the Department of Optics Techniques (Youssef Hussein Mohsen) held a scientific workshop entitled Examining the length of the optical axis using the A scan and its impact on the state of vision. Nearsightedness and farsightedness also indicates the importance of periodic examination of vision and treatment of refractive error.