Vision plays an essential and irreplaceable role in the daily activities of not only humans but many other organisms too. Optimized vision is essential for many tasks that are mandatory for the survival of the organism.
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References
- https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1444-0938.1975.tb01796.x
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3236713/
- https://www.sciencedirect.com/science/article/pii/S0161642094311183
- https://bjo.bmj.com/content/90/5/579.short