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Alexandra Mieth, Eduardo Arenas; WHAT IS UP WITH THE NASO-PUPILLARY DISTANCE…IS IT RELATED WITH ANGLE KAPPA?. Invest. Ophthalmol. Vis. Sci. 2014;55(13):2124.
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To stress the importance of the naso-pupillary distance in the prescription of eyeglasses, refractive surgery and intraocular lenses implantation to obtain a maximum comfort and correction in all types of refractive errors.
We made a retrospective review of 1262 patients half male and half female from our office, all of them having the following parameters at the time of examination: Naso-pupillar distance taken with the Essilor optical Interpupillometer separately right from left eye and cycloplegic refractive error. Cases below 18 years , and with any type of eye pathology such as cataract, corneal diseases and other were excluded.
Age average was 47.74 years .In 74 % of the cases the naso-pupillar distance was asymmetric with differences ranging from 1 mm to 6 millimeters . Naso-pupillary distance average from the right eye was 31.62 larger than the left eye 30.92. Patients with emetropia presented a higher tendency to symmetric naso-pupillary position and most cases with anisometropia higher differences. Women were more symmetric than males.
Taking the naso-pupillar distance in instead of the ordinary interpupillary distance is an important issue at the moment of prescribing eyeglasses or centering any intraocular device, even more when the patient have high refractive defects or is going to use multifocal eye glasses or intraocular lenses . Most auto refractometers and phoropters do not measure this parameter eye by eye. The Kappa angle can also be calculated, in millimeters at the same time.
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