The development of cataract to over-maturity stage may be complicated by deepening of anterior chamber, lens dislocation, crystalline lysis glaucoma, crystalline allergic uveitis.
1. Deepening of the anterior chamber: the fibers of the crystal are decomposed and liquefied, the capsular membrane is wrinkled with irregular white spots and cholesterol crystals, the crystal nucleus sinks, iris tremor occurs, and the anterior chamber deepens.
2. Lens dislocation: The suspensory ligament of advanced cataract is prone to crystal dislocation due to degenerative changes. The crystalline nucleus sinks to the bottom and moves with the change of body position, and the anterior chamber above it further deepens, which is called Morgagnian cataract.
3. Crystalline dissolution glaucoma: the lens cortex in the atrial fluid is deposited at the anterior chamber angle, and it can also be phagocytosed by macrophages, blocking the anterior chamber angle and causing secondary glaucoma, which manifests itself as corneal edema and elevated intraocular pressure.
4. Crystalline allergic uveitis: due to the degeneration of late cataract capsule, the liquefied cortex leakage to the outside of the crystal capsule. The manifestations are: ciliary body congestion, vitreous clouding, and so on.
The above complications can be relieved by cataract surgery. When cataracts have blurred vision and visual field defects, it is important to consult a doctor in a timely manner, rather than delaying until the late stage when serious complications occur.