Thank you for your question, Mina!
Regarding the first question, as discussed earlier, in cataract removal, the affected lens is entirely suctioned out and substituted with an artificial lens called the Intraocular Lens (IOL). Since the IOL is an artificial lens, it prevents the recurrence of cataracts in the same eye.
As for the second question, open-angle, closed-angle, and congenital glaucoma are three distinct types with specific differences.
- Open-angle glaucoma, the most common form, occurs when the drainage canals in the eyes become blocked over time. This leads to build up of pressure within the eye. It manifests gradually and imperceptibly, often without noticeable symptoms until significant visual field loss occurs.
- Closed-angle glaucoma (also known as closure-angle glaucoma) develops rapidly when the iris is pushed against the drainage canals, impeding fluid flow and increasing intraocular pressure. It presents more acutely with sudden onset of severe eye pain, blurred vision, halos around lights, and redness due to increased intraocular pressure. CAG requires immediate medical intervention to relieve the blockage in the drainage structures of the eye.
- Congenital glaucoma is present at birth due to improper development of the eye's drainage system during pregnancy. Unlike open-angle and closed-angle forms that typically affect adults, congenital glaucoma primarily impacts infants or children. This type also usually manifests during infancy with signs such as enlarged eyes, light sensitivity, excessive tearing, and cloudiness of the cornea. It necessitates early diagnosis and surgical intervention to avoid permanent damage to the optical system and prevent blindness in children.
We hope this answers your questions! :-) Have a great day!