Check up and medication for my mpm and son’s eye

It was the 1st quarter of 2018 when we noticed that there's something wrong with my son's eye. When he is looking far, he seems like he has a lazy eye or cross eye. Like after a days, my wife noticed a white small dot on his pupil(left). We went to a doctor and we were advised to have it ultrasound and undergo some test. We did some but never had a chance to go back to the doctor again. We dont his real condition and now it gets worse as he can no longer see in his left eye.. Same year, my mom was diagnosed for having a cataract and also needs an operation.