Metric fasteners are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimeters (measured along the length of the fastener). For example a thread pitch of 1.5 means that the distance between one thread and the next is 1.5mm. In general smaller fasteners have finer thread so they have lower thread pitch.
Albinism can be diagnosed merely by observation of major or total absence of pigmentation of the skin, hair and eyes. Other tests to diagnose albinism include -. Genetic Testing -. Genetic testing is the most accurate way to diagnose albinism and its specific type.
In humans, there are two principal types of albinism: oculocutaneous, affecting the eyes, skin and hair, and ocular affecting the eyes only. Most people with oculocutaneous albinism appear white or very pale, as the melanin pigments responsible for brown, black, and some yellow colorations are not present. Ocular albinism results in light blue eyes, and may require genetic testing to diagnose.