NHS or National Health Services eye tests are conducted at various designated centers. These centers generally have optometrists who test the eye and then prescribe for any ailment found during the test. They also give prescription for eyeglasses or contact lenses; they may refer the case to a specialist eye surgeon if needed.
NHS eye tests services are generally funded by the organization hence can be availed for free. However, there are certain criterion to be met to be entitled for NHS free eye tests, NHS funded tests or NHS optical vouchers. If you fall under any of the following categories then you are entitled for the aid - you are less than 16 years or less than 19 years and a full time student; above 60 years of age; have a family history of glaucoma; you are a registered blind.
Under NHS eye test program you can also claim a refund by filling a HC5 form along with receipt received from the glass or contact lens supplier. There are also NHS funded mobile eye test centers which have been designed exclusively to provide services to the people who can not move from home or a place due to any mental or physical conditions. The NHS eye tests are available at many centers across England.