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According to another hypothesis, POIS is caused by a hormone imbalance, such as low progesterone, [medical citation needed] low cortisol, low testosterone, elevated prolactin, hypothyroidism, or low DHEA. [20] POIS could be caused by a defect in neurosteroid precursor synthesis. If so, the same treatment may not be effective for all individuals.
However, because radiation therapy causes tissue changes, prostatectomy after radiation has higher risks of complications. To avoid the adverse side effects of a radical prostatectomy, doctors may recommend deferred treatment which can involve observation and palliative treatment or active monitoring with some local treatments as needed.
In many cases, frequent computer users develop computer vision syndrome, which is a degenerative eye problem which can result in severely reduced eyesight , blurred vision, overall eye tiredness and even glaucoma. Computer Eye Syndrome is an umbrella term for many problems but the causes of these problems can be easily identified.
Radiation therapy is used mainly in the treatment of cancer. Radiation therapy can be used to cure, care or shrink tumors that are interfering with quality of life. Sometimes radiation therapy is used alone; other times it is used in conjunction with chemotherapy and surgery.
Cyanopsia is a rare visual phenomenon characterized by a blue tint to vision. Most commonly associated with cataract surgery and certain medications, such as sildenafil, cyanopsia is typically a temporary side effect rather than a standalone disease.
There is evidence that this may be due to damage to the visual system rather than caused by cognitive deficits. In one study, 5-flouracil caused ocular toxicity in 25–38% of patients treated with the drug. [29] Methotrexate also caused ocular toxicity in 25% of patients within 2–7 days of initial chemotherapy regimen with the drug. [30]
Alcohol intoxication can cause blurred vision. Use of cycloplegic drugs like atropine [4] or other anticholinergics cause visual blur due to paralysis of accommodation. [3] Cataracts: Cloudiness over the eye's lens, cause blurring of vision, halos around lights, and sensitivity to glare. [5] It is also the main cause of blindness worldwide. [2]
Acute radiation syndrome (ARS), also known as radiation sickness or radiation poisoning, is a collection of health effects that are caused by being exposed to high amounts of ionizing radiation in a short period of time. [1] Symptoms can start within an hour of exposure, and can last for several months.