The PRA is a response to the reserve power of regulation, the greater the better. Small PRA indicates insufficient regulation, regulation is not lasting or can not produce effective regulation, so that young children are prone to myopia accelerated; and adults are prone to cause visual fatigue too. Adjustment lag/adjustment overshoot (BCC): +0.25~+0.75D (non-presbyopic eyes); +0.50D (average) Computational, gradient AC/A: normal values: 3/1~5/1 ;4/1~6/1 Convergence near point (NPC) normal reference values: rupture point 3± 100px , recovery point 5±125px. Positive fused likeability pooling range (BO prism measurement). Normal value (distance): blur: 9±4△/rupture: 19±8△/recovery: 10±4△ Normal value (near distance): blur: 17±5△/rupture: 21±6△/recovery: 11±7△ Negative convergence range (BI prism measurement): Normal value (distance): rupture: 7±3△/recovery: 4±2△ Normal value (near distance): blur: 13±4△/rupture: 21±4△/recovery: 13±5△ 4△/recovery: 13±5△ Distance vertical obliquity: orthotropia Distance vertical polarization: 3-4△ rupture/1.5-2△ recovery Distance vertical polarization: 3-4△ rupture/1.5-2△ recovery Even with the same refraction, different states of binocular vision require different correction methods: – Presence of unrelaxed accommodation (NRA low): requires relaxed accommodation – poor accommodation (PRA low): requires training, keratoplasty – curvilinear myopia: RGP, keratoplasty – high AC/A, hyperconjugation: look close to reduce the lower plus glasses – underconjugation: look close to have to wear glasses, conjugation training Adjustment Normal values of flexibility: Adjustment flexibility ±2.00D double-sided lenses (weeks/minutes) Child monocular 6 years 5.5±2.5 7 years 6.5±2.0 8-12 years 7±2.5 Child binocular 6 years 3 7 years 3.5±2.5 8-12 years 5±2.5 Adult monocular 13-30 years 11±5 30-40 years No normal value Adult binocular 10±5 Normal reference value of occlusion measurement: Telescopic occlusion 1±2△ emmetropia Proximity occlusion: 3±3△ emmetropia