Fully adjustable frame length and nose rest. Provision for nose pad is optional. Available for 4 lenses to be inserted at each side. Length and angle of leg is adjustable. Height of nose pad is adjustable. Adjust the axis of astigmatism is convenient. Frame made of metal material. PD adjustable range 48-80mm. Trial lenses and permits smooth and easy manipulation of bridge. Polarizing filters with height adjustment for distance and near examination.