To facilitate such trials normativedata on age-appropriate vision tests need to be available and a consensus reached regarding the definition of amblyopia.
还需要有助于建立标准规范的研究,包括适当视力检查的年龄,以及对弱视的有效及一致性的定义。
2
Objective to observe the cardiac structures of the normal fetuses between 11 + 0 to 14 + 6 weeks' gestation for obtaining the normativedata of the gestational age.
Normativedata suggests that, before 30 weeks, accelerations of 10 bpm sustained for 10 seconds are oberserved more commonly than accelerations of meeting the 15bpm, 15 second-criteria.