眼和眼周围疼痛为眼科常遇到的症状,大多数由眼球本身疾患所引起。但是,眼以外的一些疾患也可出现这一症状。兹略述如下: 一、眼球疾患引起的疼痛眼球的感觉由三叉神经眼支所支配,感觉灵敏。机械性刺激、组织扭变、血管扩张、温度变化和炎性产物都可引起眼和眼周围疼痛。但是定位感较差,例如,角膜可敏锐地觉察出2.8℃的温度变化而产生痛感,但不能精确地判断角膜异物的位置。此外,眼内各组织的感觉神经分布差异很大,如睫状肌和脉络膜内几无感觉神经,而近虹膜部的睫状体和小梁则有丰富的神经纤维丛。角膜浅层病变,如糜烂、异物、溃疡和大泡性病变等,因其机械性刺激的逆向冲动,使虹膜 Eye and eye pain is often encountered in ophthalmic symptoms, most of the eye caused by the disease itself. However, some conditions other than the eye can also be the symptoms. Here is a brief description of the following: First, the pain caused by eye diseases The eye feeling dominated by the trigeminal nerve eye branch, feeling sensitive. Mechanical irritation, tissue distortion, vasodilation, temperature changes, and inflammatory products can all cause eye and eye pain. However, the positioning is poor. For example, the cornea can be keenly aware of a temperature change of 2.8 ° C to cause pain, but can not accurately determine the location of the corneal foreign body. In addition, the distribution of sensory nerves in various tissues of the eye is very different, such as the ciliary muscle and choroid few sensory nerves, while the ciliary body and trabeculae near the iris have abundant nerve fiber plexus. Shallow shallow corneal lesions, such as erosion, foreign body, ulcers and bullous lesions, etc., due to the mechanical impulse of reverse impulses, the iris