How long back did you splash the oil?
Near vision can improve at your age if you are developing nuclear cataract which is common at this age. The prescription no. shifhts towards the negative side as a result near vision improves. It's difficult to say what you had when you splashed the oil drop. It is not likely to cause floaters. You may have developed posterior vitreous detachment which can cause floaters and flashes of light. This is a normal ageing change in which the vitreous gel in the back part of the eye liquifies and separates from the retina. There can be other reasons for flashes and floaters and you need a dilated eye examination by an ophthalmologist to confirm the diagnosis. Thanks and best wishes.
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