Senior Resident, JNMC, Aligarh Muslim University, Aligarh, Uttar Pradesh, India.
Professor Institute of Ophthalmology, JNMC, Aligarh Muslim University, Aligarh, Uttar Pradesh, India.
Indian J Ophthalmol. 2022 Apr;70(4):1313-1316. doi: 10.4103/ijo.IJO_2161_21.
To evaluate the Canon CP-TX1 camera as a screening tool for ARFs in a pediatric population and estimate the prevalence of ARFs.
In a pediatric outpatient space, largely in the immunization clinic, after obtaining parental consent, we encouraged children to be photographed from a distance of 5 feet in a dim room by using a CP-TX1 camera with the red-eye reduction feature off. Based on the captured red reflex, children were labeled as normal (symmetrical red reflexes in the two eyes, with no visible crescents); all others were considered as abnormal or positive for ARFs. All photographed children were assessed by an optometrist/refractionist for VA by age-appropriate methods. Data were entered into a 2 × 2 contingency table on statpages.org, and diagnostic indices were calculated with 95%CI.
With a sample of 262 children, we obtained a sensitivity of 0.82, a specificity of 0.98, a positive predictive value of 0.92, a negative predictive value of 0.94, a positive likelihood ratio of 41.06, a negative likelihood ratio of 0.17, and a prevalence of 0.24 for ARFs.
CP-TX1 performed well as a screening tool to identify ARFs in children. Placing such a camera in an immunization clinic offers a chance to identify children with ARFs at a time when amblyopia is eminently reversible.
评估佳能 CP-TX1 相机作为儿科人群 ARF 的筛查工具，并估计 ARF 的患病率。
在儿科门诊区（主要在免疫接种诊所），在获得家长同意后，我们鼓励儿童在距离 5 英尺远、光线昏暗的房间内使用 CP-TX1 相机（关闭防红眼功能）拍照。根据捕捉到的红色反射，将儿童标记为正常（双眼的红色反射对称，没有可见的新月形）；其他所有被认为是异常或 ARF 阳性的儿童。所有拍照的儿童都由验光师/屈光师根据年龄适当的方法进行视力（VA）评估。数据在 statpages.org 上的 2×2 列联表中输入，并计算了诊断指标及其 95%CI。
在 262 名儿童的样本中，我们获得了 0.82 的灵敏度、0.98 的特异性、0.92 的阳性预测值、0.94 的阴性预测值、41.06 的阳性似然比、0.17 的阴性似然比和 0.24 的 ARF 患病率。
CP-TX1 作为一种筛查工具，可用于识别儿童的 ARF，性能良好。在免疫接种诊所放置这样的相机，为在弱视极易逆转的时期识别 ARF 儿童提供了机会。
