Chambers 20th Century Dictionary(0.00 / 0 votes)Rate this definition: Engross. en-grÅsâ², v.t. to occupy wholly, monopolise: to absorb: to copy a writing in a large hand or in distinct characters: to write in legal form: to make gross.âns.
Pupillary distance (PD) is the measurement (in millimeters) of the distance between the pupils of your eyes. Pupillary distance is an important measurement used to determine the proper lens shape and alignment of your prescription correction to your line of vision.
The pupillary distance determines the measurements for the center of the patient's pupil or visual axis. Measure the pupillary distance monocularly, from the center of the nose to the right pupil and then the left pupil, or binocularly, from the center of one pupil to the other. Rest the ruler on the patient's nose for extra support when taking measurements. A crooked ruler results in inaccurate measurements.