your complaints of blurring vision are not related to using coconut oil. Your history seems like you are having floaters
. Floaters are because of age related changes in the vitreous layer of the eye. Floaters are common around 45-55 years of age because of age related liquefaction of the vitreous. However I advice you to undergo examination of the retina
and vitreous by a ophthalmologist or preferably by a retina surgeon for diagnosis and to rule out any other associated condition.