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Peng Xi Feng
Ophthalmology
About me
Shenzhen Longgang Central Hospital, Ophthalmology Deputy Chief Physician.
Proficient in diseases
Familiar with the diagnosis of various common eye diseases such as cataracts, glaucoma, eye trauma, and ocular surface diseases, skilled in eye fluorescein angiography, electrophysiology, eye A/B ultrasound and other examinations.
Voices
What department should I go to for cataracts?
The department for cataract consultations is ophthalmology. Various factors such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause metabolic disturbances in the lens, leading to the denaturation of lens proteins and resulting in opacity, known as cataracts. At this time, light is obstructed by the cloudy lens and cannot be projected onto the retina, causing blurred vision. This condition is commonly seen in individuals over forty years old, and the incidence increases with age. The disease can also be divided into congenital cataracts and acquired cataracts.
What are the symptoms of a glaucoma attack?
Typical acute angle-closure glaucoma has several different clinical stages, divided into the preclinical stage, prodromal stage, acute attack stage, intermittent stage, chronic stage, and absolute stage. The acute attack stage is mainly characterized by severe headache, eye pain, photophobia, tearing, and significant deterioration of vision, often reduced to counting fingers or hand motion, and may be accompanied by systemic symptoms such as nausea and vomiting. Physical signs include eyelid edema, mixed congestion, corneal epithelial edema, and the appearance of small droplets under the slit lamp. Patients may complain of rainbow vision, which primarily occurs due to the large number of small vesicles in the swollen corneal epithelium and the spaces between epithelial cells.
The main symptoms of cataracts
The main symptoms of cataracts include: First, a decline in vision, which is the most obvious and significant symptom of cataracts. Second, a decrease in contrast sensitivity, particularly noticeable at high spatial frequencies in cataract patients. Third, changes in refractive power. Nuclear cataracts lead to increased lens power due to an increase in the lens and refractive index, causing nuclear myopia. Fourth, monocular diplopia or polyopia due to uneven refractive power across different parts of the lens, similar to the effect of a prism, resulting in monocular diplopia or polyopia. Fifth, glare. Sixth, changes in color perception. Seventh, varying degrees of visual field defects.
Cataract is what?
All sorts of reasons, such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause metabolic disorders in the lens, leading to the denaturation of the lens proteins and resulting in opacity known as cataract. At this point, the light is obstructed by the opaque lens and cannot be projected onto the retina, causing blurred vision. It is commonly seen in people over the age of forty, and the incidence increases with age. This disease can be divided into congenital cataracts and acquired cataracts. Congenital cataracts are also known as developmental cataracts, and there are six types of acquired cataracts.
How is trachoma transmitted?
Trachoma is somewhat contagious. When it is confirmed as trachoma, the eyelids and the conjunctiva of the eyes will carry the bacterium due to Chlamydia infection. When patients touch their eyes with their hands, their fingers or palms are already carrying the bacteria, including Chlamydia. Therefore, when they come into contact with others, cross-infection can occur. Prevention of trachoma primarily involves avoiding contact infection, improving environmental hygiene, enhancing the sanitary management of service industries such as hotels, swimming pools, and barber shops, and developing good hygiene habits, including avoiding rubbing the eyes with hands.
Causes of Retinal Detachment
Retinal detachment can be categorized into three main types: rhegmatogenous, tractional, and exudative. Rhegmatogenous retinal detachment is commonly seen in the elderly, highly myopic individuals, those having undergone trauma to the eye leading to the absence of the natural lens or having artificial lens implants, and those with a history of retinal detachment or a family history of the condition, which are risk factors. Tractional retinal detachment is caused by proliferative membranes pulling on the retina. It is observed in conditions like diabetic retinopathy, central retinal vein occlusion, and other ischemic retinal diseases leading to neovascular membranes, or due to proliferative scarring from penetrating eye injuries. Exudative retinal detachment typically occurs in conditions such as Coat’s disease, uveitis, and malignant hypertension.
Does conjunctivitis require injections?
Conjunctivitis generally does not require injections. Treatment is based on the cause, primarily with local medication, and systemic medication is used only when necessary. During the acute phase, avoid bandaging the affected eye. First, using eye drops is the most basic way to administer treatment for conjunctivitis. Second, apply eye ointment, preferably before going to sleep. Third, rinse the conjunctival sac. Fourth, for severe conjunctivitis, such as gonococcal conjunctivitis, in addition to local treatment, systemic antibiotics are also necessary.
Conjunctivitis Irrigation Method
The treatment principles of conjunctivitis focus on treating the cause, primarily administering local medications, with systemic medication when necessary, and washing the conjunctival sac. When there is a significant amount of secretion in the conjunctival sac, an non-irritating wash solution such as saline or 3% boric acid solution can be used for washing one to two times a day, to clear the secretions from the conjunctival sac. Care should be taken to avoid the washing solution from entering the healthy eye to prevent cross-infection.