Thanks for writing in.
I read your query,first of all i would like to inform you that there is no correlation between cataract
and dental problem.
Cataract is a specific protein of eye lens related problem.
There are so many reasons of cataract like-
2.hereditary enzyme defect in early childhood cataract,
3.excessive ultraviolet rays exposure,
And that is true eye are very important.
So nothing to get worried,please visit a dentist
near by your place,and get restoration done for decayed teeth,otherwise in the absence of proper treatment caries will proceed deeper and reach to the pulp,in that case you have to go for root canal treatment
and again if will ignore that problem,it will destroy the most of the tooth structure and supporting tissues,which will lead to removal of teeth.
So please visit to a dentist as soon as possible and take a proper treatment to related problems.