Trade encourages specialisation, which brings prosperity; global capital markets, for all their problems, allocate money more efficiently than local ones; economic co-operation encourages confidence and enhances security. Yet despite its obvious benefits, the globalised economy is under threat.
RA (the most common disease cause) and Paget disease of the cervical spine can cause atlantoaxial dislocation or subluxation, basilar invagination, or platybasia. Metastatic tumors that affect bone can cause atlantoaxial dislocation or subluxation.
Checking for astigmatism is a routine component of most eye exams. As astigmatism can strongly affect visual acuity, ophthalmologists often catch it while testing eyesight using letter boards. Difficulty reading smaller lines is generally indicative of a vision disorder.