Features： 1、Improve Problems: The eye aperture rule trainer improves accommodation, fusion, stereopsis, removes inhibition, and strengthens the relationship between accommodation and collection. 2、 Kinds Of Plates: The Eye Rule Trainer is equipped with 2 kinds of plates, the single hole plate is used for collective training, and the double hole plate is used for spreading training. Single orifice plate and double orifice plate adopt pull out design, which is convenient for replacement and reduces wear and tear. 3、Clear Scale: The scale on the eye aperture trainer set is clear, you can slide the single hole plate or double hole plate to the corresponding scale, the plastic is smooth and the workmanship is . 4、Adjustable: The eye aperture trainer can be adjusted freely, the height and inclination angle can be adjusted, and you can adjust it according to your own situation. 5、Cards: Step by step training cards, from No. 1 to No. 12, the distance between the figures gradually increases and the training difficulty gradually increases. Specification： Item Type: Eye aperture rule trainer Material: ABS Scope Of Application: Treating people with poor eye convergence and fusion, strabismus training and postoperative consolidation, increasing the range of positive and negative fusion, and restoring stereo vision will have good effect. Package List： 1 x Slit Ruler 1 x Trainer Splint 1 x Spectacle Plate 1 x Single Hole Plate 2 x Adjustment Plates 2 x Clips 2 x Cards 1 x Guide Stick 1 x Manual