C Heine1, F Yazdani, H Wilhelm. 1. Department für Augenheilkunde, Universitätsklinikum Tübingen, Tübingen.
Abstract
AIM OF THE STUDY: For the construction of true accommodating intraocular lenses and for refractive surgery a knowledge about pupil diameter in daily life is important. Sufficient data are available only in darkness. MATERIAL AND METHODS: 206 volunteers aged between 18 and 72 years without disorders influencing the pupil have been examined by means of pupillography at two luminance conditions (3 and 30 cd/m2) and 3 fixation distances (5 m, 1 m, 0.33 m). RESULTS: Pupil size decreases by 0.42 mm per decade with the darker condition and 0.25 mm per decade with brighter light. Fixation change from 5 to 1 m has hardly any influence on pupil size, changing to 0.33 m constricts the pupil by 0.43 mm at dark condition and 0.33 mm at the lighter condition. CONCLUSION: Luminance has the strongest influence on pupil size, near fixation has hardly any influence down to 1 m. The well-known age relation of pupil size in darkness is also valid for mesopic and photopic conditions. At 3 cd/m2 it was the same as reported in darkness, at 30 cd/m2 it was less in absolute numbers, but relative as compared to young adults it was approximately the same. Georg Thieme Verlag KG Stuttgart · New York.
AIM OF THE STUDY: For the construction of true accommodating intraocular lenses and for refractive surgery a knowledge about pupil diameter in daily life is important. Sufficient data are available only in darkness. MATERIAL AND METHODS: 206 volunteers aged between 18 and 72 years without disorders influencing the pupil have been examined by means of pupillography at two luminance conditions (3 and 30 cd/m2) and 3 fixation distances (5 m, 1 m, 0.33 m). RESULTS: Pupil size decreases by 0.42 mm per decade with the darker condition and 0.25 mm per decade with brighter light. Fixation change from 5 to 1 m has hardly any influence on pupil size, changing to 0.33 m constricts the pupil by 0.43 mm at dark condition and 0.33 mm at the lighter condition. CONCLUSION: Luminance has the strongest influence on pupil size, near fixation has hardly any influence down to 1 m. The well-known age relation of pupil size in darkness is also valid for mesopic and photopic conditions. At 3 cd/m2 it was the same as reported in darkness, at 30 cd/m2 it was less in absolute numbers, but relative as compared to young adults it was approximately the same. Georg Thieme Verlag KG Stuttgart · New York.
Authors: Seyed Mohammad Ghoreishi; Seyed Ali Akbar Mortazavi; Zahra-Alsadat Abtahi; Mohammad-Ali Abtahi; Seyed Ali Sonbolestan; Seyed-Hossein Abtahi; Mohadeseh Mohammadinia; Kimia Nekouie Isfahani Journal: Int Ophthalmol Date: 2016-09-26 Impact factor: 2.031
Authors: Timur M Yildirim; Gerd U Auffarth; Hyeck-Soo Son; Christian Huber; Flemming Beisse; Ramin Khoramnia Journal: Am J Ophthalmol Case Rep Date: 2018-11-20