Abbreviation commonly referring to spherical power in optometry (lens prescriptions) or to other sphere-related measurements in various technical fields.
Abbreviation of 'sphere' or 'spherical', from Greek 'sphaira' (ball, sphere). In medical contexts, particularly ophthalmology, it indicates the spherical correction needed for vision.
The abbreviation 'sph' on your glasses prescription represents one of humanity's most precise measurements - it quantifies exactly how your unique eyeball shape bends light differently from the ideal sphere!
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