Relationship between the Alignment of a Non-Mydriatic Fundus Camera，Anterior Chamber Depth and Axial Length

Yin Guo， Yaqin Zhang， Liang Xu*， Yaxing Wang， Yingnan Ma， Xin Wang， Jost B.Jonas

1.Beijing Institute of Ophthalmology，Beijing Tongren Hospital and Capital Medical University，Beijing 100005， China

2.Department of Ophthalmology，Faculty of Clinical Medicine Mannheim，University of Heidelberg，Mannheim 08222，Germany

Materials and methods

Figure 1 Photograph of the adjustment knob at the site of the fundus camera

Statistical analysis

Results

Discussion

Figure 2 Scattergram showing the correlation between the position of the adjustment knob for focusing of the fundus image in the fundus camera and the refractive error of the examined eye（P＜0.001；correlation coefficient r＝－0.77）；Refractive Error （Diopters）＝－0.22 x Position of the adjustment knob of the fundus camera （Degree）－1.16.

Figure 3 Scattergram showing the correlation between the position of the adjustment knob for focusing of the fundus image in the fundus camera and the axial length of the examined eye（P＜0.001； correlation coefficient r＝ 0.65）； Axial Length（mm）＝0.08 x Position of the adjustment knob of the fundus camera （Degree） ＋23.90.

Figure 4 Scattergram showing the correlation between the position of the adjustment knob for focusing of the fundus image in the fundus camera and the anterior chamber depth of the examined eye（P＜0.001； correlation coefficient r＝0.48）；Anterior Chamber Depth.（mm）＝0.022 x Position of the ad justment knob of the fundus camera （Degree） ＋2.82.