Public condition directory
Browse public condition summaries from China medical resources by stable specialty category.
Ophthalmoplegia
Ophthalmoplegia is caused by damage to the oculomotor nerves and the extraocular muscles they innervate due to various reasons. The main clinical manifestations include ptosis, impaired eye movement, pupillary changes, strabismus, diplopia, decreased vision, and orbital pain.
View detailsOcular ischemic syndrome
Ocular ischemic syndrome is a series of cerebral and ocular symptoms caused by insufficient blood supply to the brain and eyes due to carotid artery occlusion or stenosis. It commonly affects men over 50 years old and can manifest as transient monocular blindness (i.e., temporary vision loss), decreased vision, and eye pain.
View detailsOptic neuropathy
The optic nerve is a pathway connecting the eyeball to the brain. Optic neuropathy refers to the degeneration of the optic nerve due to various causes, leading to a loss of its conductive function, resulting in blurred vision or even blindness. The main symptoms include sudden vision loss and visual field defects.
Optic neuritis
The optic nerve is a nerve that connects the brain and the eye, responsible for transmitting visual information from the eye to the brain in the form of electrical signals. Optic neuritis is an inflammation of the optic nerve caused by various factors, mainly classified into the following three types: Idiopathic optic neuritis: The most common type, which can be further divided into two subtypes: Idiopathic demyelinating optic neuritis: May be an early ocular manifestation of multiple sclerosis. Neuromyelitis optica spectrum disorder (NMOSD)-related optic neuritis: Associated with neuromyelitis optica spectrum disorder, which can affect the spinal cord in addition to the optic nerve. Infectious optic neuritis Autoimmune optic neuritis This condition is more common in young and middle-aged adults. The main symptom is a rapid decline in vision within a short period.
View detailsBlepharospasm
Blepharospasm refers to involuntary spastic contractions of the orbicularis oculi muscles of the eyelids and periorbital area, manifesting as frequent blinking or progressively worsening difficulty opening the eyes in one or both eyes. According to the etiology, it can be divided into primary blepharospasm and secondary blepharospasm. Primary blepharospasm refers to blepharospasm of unknown cause, also known as idiopathic blepharospasm. Secondary blepharospasm refers to blepharospasm secondary to certain diseases.
View detailsChalazion
A chalazion, also known as a meibomian cyst or meibomian gland lipogranuloma, is an idiopathic chronic non-suppurative inflammation of the meibomian gland. The meibomian glands in the eyelids secrete oil to keep the eyes moist, but when their ducts become blocked, it can lead to the formation of a cyst, known as a chalazion. A chalazion presents as a red, swollen lump on the eyelid, and the cyst can range in size from a grain of rice to a soybean.
View detailsEyelid tumor
The eyelid, commonly known as the "eyelid skin," is a skin tissue located near the edge of the eyeball. It is divided into the upper and lower eyelids. The eyelid covers the surface of the eyeball and plays an important protective role for the eye. Eyelid tumors refer to tumors that occur in the eyelid area and can be divided into the following two categories: Benign eyelid tumors: Clinically common. Such as papilloma, pigmented nevus, cyst, hemangioma, etc. Malignant eyelid tumors: Clinically rare. Such as basal cell carcinoma, meibomian gland carcinoma, squamous cell carcinoma, malignant melanoma, undifferentiated adenocarcinoma, etc. The main manifestation is the abnormal growth of a mass on the eyelid.
View details