Sounds like a problem of the retina. Consult an Ophthalmologist (preferably a retinal surgeon) to get the problem properly evaluated

Hi.... the lens of the eye is necessary to accurately focus light onto the retinal surface and removal of the cataract involves removal of the lens, modern cataract surgery combines removal of the lens and placement of a new artificial lens into the eye. Measurements for the size, shape, and power of this lens will be taken prior to the surgery so that the specific lens can be available for implantation at the time of surgery..... Consult ophthalmologist.....