Comparison and analysis of contrast sensitivity and near point distance of military pilots of different ages
QI Linsong
YAO Lu
ZHU Di
ZHAO Chen
YU Dongrui
ZHANG Jiakang
LIU Yong
Abstract：Objective To compare the contrast sensitivity,near vision,and near point distance of military pilots of different age groups,and explore the impact of age on flight visual function.Methods Eighty-one male military pilots from a nursing center were randomly selected and divided into 4 age groups(20-30 years,＞30-40 years,＞40-50 years and＞50-60 years).Contrast sensitivity and pupil size were tested by Metrovision MonPackOne,standard logarithmic near vision chart was used for near vision test,and near point distance was measured by using proximity method.Results The contrast sensitivity of 4 c/d and 16 c/d in right eye of age group of＞50-60 years was significantly lower than that in any other age groups(P＜0.05),and the contrast sensitivity of 16 c/d in left eye of age group of＞40-50 and＞50-60 years were significantly lower than that in age group of＞30-40 years(P＜0.05).LogMAR near vision and near point distance of each eye in age group of＞40-50 years were significantly higher than those in age group of 20-30 and＞30-40 years(P＜0.05),and logMAR near vision and near point distance of each eye in age group of＞50-60 years were significantly higher than those in any other age groups(P＜0.05).The right-eye pupil size in age group of＞40-50 and＞50-60 years was significantly smaller than that in age group of 20-30 years under dark background(P＜0.05).Each pupil size in age group of＞30-40 and＞40-50 years was significantly smaller than that in age group of 20-30 years under bright background(P＜0.05).The pupil size changes between bright and dark background in age group of＞50-60 years was significantly lower than that in age group of 20-30 years(P＜0.05).Conclusion Older pilots experience mild visual impairment of lower high spatial frequency contrast sensitivity,decreased near vision,and insufficient regulatory function.In order to reasonably extend their flight duration,precise screening and scientific improvement of age-related visual impairment are the next focus of work.
Keywords：contrast sensitivitynear visionnear point distancepilot
Publication Date：2024-10-28
Online Publishing Date：2026-08-26(First online date of this platform, not the publication date of the document)
Pages：4( 1161-1164 )