The initial symptom of keratitis?

summary

Keratitis is divided into ulcerative keratitis, also known as corneal ulcer, non ulcerative keratitis, namely deep keratitis. It is caused by internal and external factors. Inflammation caused by corneal trauma, bacterial and viral invasion. The affected eye has foreign body sensation, tingling and even burning sensation. Mixed congestion on the surface of bulbar conjunctiva, accompanied by fear of light, tears, visual impairment and increased secretion. Corneal surface infiltration and ulcer formation. Ulcerative keratitis, also known as corneal ulcer, is mostly caused by external factors, that is, inflammation caused by infectious pathogenic factors invading into corneal epithelial layer. The initial symptom of keratitis? Let's talk about it

The initial symptom of keratitis?

In addition to paralytic keratitis, most patients with keratitis have severe inflammatory symptoms, such as pain, shyness, tears and blepharospasm. This is due to the reflex orbicularis oculi muscle contraction and excessive tear secretion caused by inflammatory stimulation of the trigeminal nerve endings in the cornea. The cornea is an avascular tissue, but the adjacent area is rich in blood vessels (the blood vessels of limbus corneae and iris ciliary body). When inflammation affects the adjacent tissue, there is congestion and inflammatory exudation. Therefore, patients with keratitis not only have ciliary congestion, but also iris congestion. The latter showed iris discoloration and pupil narrowing.

The exudates come from the same source. Serious patients with bulbar conjunctiva and even eyelid edema will occur. Because of the congestion of corneoscleral limbus, the white blood cells move to the corneal focus and the corneal infiltration occurs. When the keratitis to the degenerative stage, the clinical irritation symptoms are greatly reduced.

Keratitis will inevitably affect vision more or less, especially when inflammation invades the pupil area. The corneal scar formed after ulcer healing not only blocks the light from entering the eye, but also changes the corneal surface curvature and refractive power, making the object unable to focus on the retina to form a clear image, resulting in decreased vision. The degree of vision involvement depends entirely on the location of the scar. If it is located in the middle of the cornea, even though the scar is small, it has a great impact on vision.

matters needing attention

If there are many secretions, normal saline or 3% boric acid solution can be used to flush the conjunctival sac three or more times a day, so as to flush out secretions, necrotic tissue, bacteria and toxins produced by bacteria. In this way, not only the factors of infection expansion can be reduced, but also the concentration of local application can be ensured.