Anything they can do to improve vision years after congenital cataract surgery?

Possibly. You should see an eye doctor to determine if anything can be done to improve vision. In some cases, glasses or a contact lens can help improve vision. Other issues such as glaucoma, amblyopia, etc may limit best corrected vision though.
See below. You may be able to improve the vision with glasses, contacts or laser correction. There may be scar tissue that can be lasered. Depending on the age, you can patch the other eye. You need exam and recommendations from ophthalmologist.
Congenital cataract. Depending on how long ago the surgery was performed, there are many things that can be done. A complete eye exam to determine the state of your eye would be necessary. Some people would benefit from refractive surgery and others from a new intraocular lens. Your doctor can go over all your options.
Depends. You may be able to improve the vision with glasses, contacts or laser correction. There may be scar tissue that can be lasered. Depending on the age, you can patch the other eye. You need exam and recommendations from ophthalmologist.

Related Questions

I'm wondering can the removal of a congenital cataract in an adult help improve their vision?

Not likely. Congenital cataracts block the vision in childhood and therefore the vision does not develop properly in that eye. This called amblyopia. Even if the cataract is removed later in life the eye will not see straight ahead. The most you could hope for is increased peripheral vision.
Amblyopia & CS. Amblyopia/lazy eye: occurs when eye does not have visual input to the brain for the connection to develop. If told have severe amblyopia, it is unlikely for a cataract surgery to improve vision. However, that said, I & many eyeMDs have patients who were told they had a lazy eye but ended up having significantly improved vision after cataract surgery or PPV/ vitrectomy. See eyedoc2020.Blogspot. Com.

Please tell me, could the removal of a congenital cataract in an adult help improve their vision?

Maybe. Depends upon the intensity of the cataract and whether you had normal vision at the time of full development of vision around age 8 years. If the visual potential is good and the cataract obstructs, then improved vision is likely. Otherwise be prepared for something less than perfect.
Congential Cataract. Congential Cataract can cause amblyopia/lazy eye: occurs when eye does not have visual input to the brain for the connection to develop. If told have severe amblyopia, it is unlikely for a cataract surgery to give 20/20. Pts who were told they had a lazy eye can have significantly improved VA after cataract surgery. See eyedoc2020.Blogspot.

Could the removal of a congenital cataract in an adult help improve their vision?

It depends. If your eye was lazy as a child due to the cataract, then you may not get much vision improvement from cataract surgery as an adult. On the other hand, if you initially saw well then the vision got worse because of the cataract, then you have a better prognosis for vision improvement.
Congential Cataract. Congential Cataract can cause amblyopia/lazy eye: occurs when eye does not have visual input to the brain for the connection to develop. If told have severe amblyopia, it is unlikely for a cataract surgery to give 20/20. Pts who were told they had a lazy eye can have significantly improved VA after cataract surgery. See eyedoc2020.Blogspot.