However, a small magnitude or intermittent strabismus can easily be missed upon casual observation. In any case, an eye care professional can conduct various tests, such as cover testing, to determine the full extent of the strabismus. Symptoms of strabismus include double vision and/or eye strain. To avoid double vision, the brain may adapt by ignoring one eye. In this case, often no noticeable symptoms are seen other than a minor loss of depth perception.
About trade unions. Trade unions are groups of employees who join together to maintain and improve their conditions of employment. The typical activities of a trade union include providing assistance and services to their members, collectively bargaining for better pay and conditions for all workers, working to improve the quality of public services, political campaigning and industrial action.
A trade union is an organisation with members who are usually workers or employees. It looks after their interests at work by doing things like: 1  negotiating agreements with employers on pay and conditions. 2  discussing big changes like large scale redundancy.3  discussing membersâ concerns with employers.f your trade union subscriptions are taken from your pay without your consent, you could make a complaint to an employment tribunal against your employer. If your complaint is successful the employment tribunal can order your employer to pay you the value of the unauthorised payments.