lens opacity
Introduction
Introduction Lens contusion is mainly characterized by lens opacity and dislocation. When the eyeball is suddenly hit by the front, the lens fiber is swollen or even broken. Light, scattered under the anterior capsule, punctate or flaky. In severe cases, the whole lens is turbid, which seriously affects vision. Some can be absorbed within a few weeks, the turbidity disappears, and some become permanent turbidity. After some contusion, the lens capsule ruptures. If the rupture is small and closes quickly Turbidity can be limited, otherwise it can be invaded by aqueous humor, resulting in total turbidity.
Cause
Cause
Cause of disease
1. The clogging of the hardcover due to trauma.
2. Pathophysiological reasons.
3. Due to the complete or partial rupture of the suspensory ligament. Upon partial rupture, the lens shifts in the opposite direction of rupture of the suspensory ligament.
4. Various causes such as aging, genetics, local dystrophies, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause lens metabolism disorders.
Examine
an examination
Related inspection
Examination of the lens and CT examination of the temporal region
1. Genetic examination: It can be performed when it is suspected to be a congenital lens ectopic to confirm the diagnosis.
2. Blood and urine tests: Determine whether or not homocystinuria is included to rule out homocystinuria.
3. B-ultrasound: When the lens is completely dislocated and the position cannot be clearly determined, the eyeball B-ultrasound can be used for searching.
4. Cardiac color Doppler examination: Defining heart valve disease and hemodynamics.
Diagnosis
Differential diagnosis
Need to be identified with the following symptoms:
Lens shift: Under normal conditions, the lens is suspended by the lens suspensory ligament on the ciliary body, and its center is almost identical to the visual axis. The partial or total loss or disconnection of the lens suspensory ligament due to congenital, traumatic or pathological causes, etc., causes the suspension force imbalance or loss of the lens to cause the lens to leave the normal physiological position called ectopia lentis. The degree of ligament defect or disconnection (partial or complete) lens ectopic is divided into subluxation and liberation/dislocation; according to the cause of lens ectopic, it is divided into congenital, spontaneous and traumatic.
Lens glaucoma: Lens glaucoma is one of the symptoms of primary acute angle-closure glaucoma.
Lens protein escape: lens protein escape is a pre-symptom of lens protein allergic glaucoma.
