Typically, the Ishihara tests are used to diagnose color deficits.
Very probably it is a humbug.
Blood tests are used to diagnose maternal antibodies against CMV or fifth disease.
Pulmonary function tests are used to diagnose respiratory disorder. Lung volume and lung capacities are measured. Normally the doctor will use an instrument called spirometer to measure various lung volumes. Some of the lung disorder a patient can have are: asthma, and Emphysema.
electrocardiogram, stress tests, cardiac catheterization, imaging tests such as a chest x ray, blood tests
You should definitely take your son to the doctor to be tested for bipolar disorder. The doctor will most likely do psychological tests to see if he meets the things to qualify.
A liver scan may also be helpful in diagnosing specific disorders, by detecting features which are characteristic of a disorder, such as cirrhosis of the liver. It may be part of the battery of tests used to evaluate candidates for liver transplant
Blood test and also they will show in an x-ray.
Urine tests will detect human chorionic gonadotropin (HCG).
Unfortunately, there is no blood test or physical exam that can diagnose bipolar disorder, even though these procedures might be used to rule out physical causes that may mimic the symptoms of bipolar disorder. There are some psychological tests, such as the Minnesota Multiphasic Personality Inventory or mood disorder questionnaires, that can be administered during psychological assessments to help psychiatrists and other mental health professionals reach a diagnosis of bipolar disorder.
Tests that detect decreasing lung capacity during the workday are used to diagnose byssinosis.
Blood tests help diagnose endocrine disorders due to the level of hormones found in the blood. The endocrine system basically would be showing a disorder if the level of hormones in the bloodstream are off. Also, it could show that the body isn't clearing the hormones out of the bloodstream correctly.