数字化新技术与传统方法测量配镜参数的比较OA

Objective:To evaluate the agreement in spectacle parameter measurements between a digital device(Eye-ruler2)and a manual method(combination gauge).It also aimed to explore how these parameters affect corrective prescriptions and provide evidence and insights for achieving precision in spectacle fitting and enhancing visual quality.Methods:We enrolled 103 university students(aged 18-23 years)who were wearing spectacles from Guangzhou Xinhua University.The vertex distance,pantoscopic tilt,face form,and pupillary distance of their existing eyewear were measured using both Eye-ruler2 and a combination gauge.We applied the Martin formula and the vertex power formula to calculate the changes in prescription power induced by vertex distance,pantoscopic tilt,and face form.Results:The measurements obtained from Eye-ruler2 and the combination gauge demonstrated excellent agreement for pupillary distance(ICC=0.95),good agreement for left vertex distance(ICC=0.80)and right vertex distance(ICC=0.76),and moderate agreement for pantoscopic tilt(ICC=0.67).However,poor agreement was observed for face form(ICC=0.37).The total refractive power change in the prescription,calculated based on vertex distance,pantoscopic tilt,and face form,was(-0.12±0.15)D.The individual parameter contributions(and their proportions)were as follows:Vertex distance:(-0.04±0.11)D(40.61%),Pantoscopic tilt:(-0.06±0.09)D(41.83%),Face form:(-0.01±0.01)D(16.57%);No significant difference was found between the contributions of pantoscopic tilt and vertex distance(P=0.851),and both being significantly greater than that of face form(all P<0.001).The baseline spherical equivalent positively correlated with refractive changes.Pantoscopic tilt dominated for prescriptions≤-6.00 D,while vertex distance prevailed between-12.00 D and-6.00 D.Conclusions:Eye-ruler2 and the combination gauge demonstrated a high level of agreement in parameter measurements.Given its efficiency and user-friendliness,the digital technology is recommended to replace traditional methods for clinical use.Vertex distance and pantoscopic tilt have a significant impact on prescription power.Although face form has a minimal quantitative effect,it may induce against-the-rule astigmatism,which can compromise visual quality.For personalized spectacle fitting,it is essential to routinely measure vertex distance,pantoscopic tilt,and face form.