|
KMID : 1011420210260040255
|
|
Journal of Korean Ophthalmic Optics Society
2021 Volume.26 No. 4 p.255 ~ p.259
|
|
|
Variations in Decisions of Addition and Pupillary Distance for Progressive Addition Lenses Fitting
|
|
Noh Jae-Hyeon
Moon Byeong-Yeon
Yu Dong-Sik
Kim Sang-Yeob
Cho Hyun-Gug
|
|
|
Abstract
|
|
|
Purpose: To investigate the variations in the decisions of addition and pupillary distance (PD) for progressive addition lens fitting.
Methods: Thirty subjects (15 male and 15 female; mean age 22.46±1.16), monocular/binocular amplitude of accommodation (AA) depending on gaze direction (0° and 15°, 30°, 45° downward) and near PD with/without addition lenses were examined after refractive full correction. For 78 subjects (43 male and 35 female; average age 22.60±1.78), PDs depending on fixation distances (5, 4, 3, 2, 1.5, 1, 0.5, and 0.4 m) were measured and compared to the calculated PDs at the same distance using correlation coefficients.
Results: All AAs measured at 15°, 30°, and 45° downward gaze were proportionately increased (p<0.001) with angular size compared to AA at horizontal (0°) gaze in all OD, OS, and OU. There was no difference in near PDs with and without the additional lenses. Correlation coefficients between measured PDs and calculated PDs showed a positive relationship in all fixation distances (r=1.000 at 5 m, r=0.986 at 4 m, r=0.726 at 3 m, r=0.967 at 2 m, r=0.955 at 1.5 m, r=0.948 at 1 m, r=0.953 at 0.5 m, r=0.946 at 0.4 m).
Conclusions: Addition measured at the horizontal gaze should be adjusted in conditions with a habitual gaze angle. The distance PDs measured at finite distances should be properly calibrated to those of an infinite distance.
|
|
|
KEYWORD
|
|
|
Progressive addition lenses, Accommodation, Gaze angle, Fixation distance, PD calibration
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|