Be aware - teachers and other educational professionals do not usually have any training whatsoever in recognition, assessment and treatment of visual perceptual problems that are so common in their classrooms. (at least one child per class!).

Ask your teacher about their training and knowledge levels if they give advice.

Current practice in education

Training for educational professionals - usually nil or minimal
Pre screening assessment for children - usually non existent
Screening - maybe with overlays or rulers using reading speed as a guide to performance - these miss the worst cases, are often wildly inaccurate and must be described as poor practice. 

Children are often given overlays to use when reading, and if they continue to use them for a significant period (often 3 months or more) they may go on to a further professional assessment. This is an extraordinarily inappropriate method of addressing visual perceptual problems.

The above scenario is unacceptable, it costs the country billions of pounds per year and ruins lives.

The effect on the child

The child will underachieve, will lose self esteem and their lives are often blighted.
Job prospects are reduced, the child will be demoralised, they won't be challenged intellectually and often respond by becoming either introverted or in many by cases playing truant. Parents are often accused of poor parenting skills, in the worst cases some parents have been accused of "Munchausen by Proxy!"

The child usually knows that they have perceptual problems - it is sad that so many professionals discount their evidence!

What should be done by your school

All teachers should have basic training in recognition, pre screening and management - this is essential
Screening techniques need to be taught to specialists within the education system. They wil be taught how to assess the non reader / very poor reader, the dyspraxic child, the autistic child and more. 
They could then refer those with significant problems to specialists and take appropriate action with those that don't need specialist intervention.

Other professionals 

Coordination with other professionals such as occupational therapists, psychologists, speech and language therapists, physiotherapists, doctors should be undertaken and  "joined up" thinking should take place.

Costs

It is a lot cheaper to deal with the problem than to pretend it does not exist and deal with the consequences. It is shameful if we do not take all reasonable and appropriate actions to address this epidemic within our education system. Costs for education are very low in comparison with the consequential costs. Insist your school has an informed policy. We wil be happy to help.