C4.6.3 The registered dispensing optician should ensure, when supervising a person who is dispensing or supplying spectacles to a patient, that the supervisee is aware of the need to :
• take appropriate measurements for the lenses and frame
• check the lenses against the relevant Standards,
• fit the spectacles to the correct plane and height The supervising practitioner should satisfy themselves that any person under their supervision is able to carry out these measurements or adjustments, or where this is not the case intervene as necessary to ensure these are carried out correctly.