1. [1] W. H. Organization, Global Report on Diabetes, (2015).
2. [2] Obesity linked to eye disease, www.theguardian.com, 28, (2005).
3. [3] T.Buhari, A.K.Musa, M.I.Badamasi, Relationschip of Body Mass Index and Head Circumference with Visual Acuity among Undergraduate Student in Kano State, Nigeria, Bayero J.Biomed Sci , 5(1):574-582, (2020).
4. [4] S.Sârbu, C.Spulber, Some contributions to the study of the effects of human motricities through Nordic walking, International Journal of Modeling and Optimization, 12(4), pp.109-113, (2022).
5. [5] https://en.wikipedia.org/wiki/Contrast_(vision)