Lakkis Carol, Weidemann Kate
Clinical Vision Research, Carlton, Australia.
Clin Exp Optom. 2006 Jul;89(4):246-52. doi: 10.1111/j.1444-0938.2006.00056.x.
To compare the performance of clear and photochromic spectacle lenses in children and adolescents, with respect to visual acuity and satisfaction with day-to-day activities.
Fifty full-time spectacle wearers, aged 10 to 15 years, were randomly assigned to wear clear and Transitions photochromic spectacle lenses for two weeks each in a crossover fashion. Subjects were evaluated at screening, lens delivery and two weeks post-delivery. At each visit, distance and near visual acuity (VA, logMAR) were assessed and subjective questionnaires, using Likert scales, were administered. Parents/guardians also completed questionnaires at entry and exit from the study.
There were no significant differences in VA between clear and photochromic lenses (p > 0.05) and no difficulties were encountered with completion of the questionnaires. Subjective evaluation of vision in bright sunlight and when playing sport was significantly better with photochromic compared to clear lenses (p < 0.05). There were no significant differences between lens designs in subjective performance indoors, such as in the classroom or when reading (p > 0.05). Forty-three subjects (88 per cent) chose to continue wearing photochromic lenses on conclusion of the trial. Thirty subjects (61 per cent) preferred photochromic over clear lenses due to reasons such as darkening in sunlight, better vision and less squinting in sunlight. Forty-three parents (88 per cent) rated the children's overall experience with photochromic lenses to be favourable or very favourable.
Photochromic lenses can be successfully prescribed for children and adolescents aged 10 to 15 years. Clear and photochromic lenses were considered to be equivalent for indoor activities; however, photochromic lenses were significantly preferred over clear lenses for outdoor activities. Likert grading scales can be used effectively in questionnaires for children and adolescents and further development of questionnaires for use in clinical trials evaluating lens performance in children is warranted.
比较儿童和青少年中透明眼镜片与光致变色眼镜片在视力及日常活动满意度方面的表现。
五十名年龄在10至15岁的全日制眼镜佩戴者以交叉方式被随机分配，分别佩戴透明镜片和渐变光致变色镜片两周。在筛查、镜片交付时及交付后两周对受试者进行评估。每次就诊时，评估远视力和近视力（视力，logMAR），并使用李克特量表进行主观问卷调查。父母/监护人在研究开始和结束时也完成问卷。
透明镜片和光致变色镜片在视力方面无显著差异（p>0.05），且问卷完成过程中未遇到困难。与透明镜片相比，光致变色镜片在强光下及运动时的主观视力评价明显更好（p<0.05）。在室内主观表现方面，如在教室或阅读时，不同镜片设计之间无显著差异（p>0.05）。四十三名受试者（88%）在试验结束时选择继续佩戴光致变色镜片。三十名受试者（61%）因诸如在阳光下变暗、视力更好及在阳光下眯眼较少等原因更喜欢光致变色镜片而非透明镜片。四十三名家长（88%）对孩子使用光致变色镜片的总体体验评价为良好或非常良好。
可为10至15岁的儿童和青少年成功开具光致变色镜片处方。透明镜片和光致变色镜片在室内活动中被认为效果相当；然而，在户外活动中，光致变色镜片明显比透明镜片更受青睐。李克特分级量表可有效地用于儿童和青少年的问卷调查，并且有必要进一步开发用于评估儿童镜片性能的临床试验问卷。
