Lenses are not always made exactly to prescription. especially the astigmatic correction. Occasionally lenses reversed with " neurological" symptoms.
Ask the tolerance accepted by the optical dispenser. Usually the more expensive the lenses, the more accurate the manufacture.
If the lenses are not accurate the optician can return the lenses for another set at no charge,
Opticians who are just Managers of large chains may be less`eager to return lenses. OWNER OPTICIANS
advised.
Dr Alex Franklin.
Toronto
Clinical case. Elderly lady with acute headache and blurring of vision. Referred to Toronto General Neurologist Prov.diag Trans. Ischaemic attack.. On further visit learned about new specs. According to Ophthalmologist round lenses were accidentally reversed by Optician. After adjusting lenses; cured. Spherical correction about same bilaterally. Astigmatic correction different. Patients often advised that a few weeks needed to get used to new prescription. So accepted new lenses from Optician.
