We surely would all agree that this is the last of the senses we would want to lose, but yet we often take our eyes and eyesight for granted. Diabetes and eye infections can also cause them. The protiens in our lens thicken and cause the lens to become cloudy. They aren't painful. Vision becomes blurry until the person is virtually blind if not taken care of.
Eye exams show cataracts.
They can be removed surgically for sight to be fully restored. This corrects itself quickly in most cases. If the muscle of the eye doesn't strengthen, the child stays with crossed eyes, called strabismus or lazy eye. The brain will turn off the message from the crossed eye and just read the strong eye's vision, so the lazy eye will stay weak and lazy. Special tests can be done and should be done as soon as the problem is recognized.