what a coincedence...

no not really but if you post a reason down then we might get an idea...

but not really

well in astitva simran went blind.. and yash used her blindness to his advantage to get revenge against his father who chose simran over yash's mother. The truth finally came out when simran got her eyesight back. Yash's father figured out that yash was his son. In saat phere, samar is blind and kaveri is using it to her advantage to get revenge on her inlaws for not treating her right when she first walked through there door. Brijesh will eventually find his son, urvashi will be exposed the whole truth will come out, of course one person may have to die in order for the truth to come out...