How do you test near point of convergence? Measure the near point of convergence (NPC). The examiner holds a small target, such as a printed card or penlight, in front of you and slowly moves it closer to you until either you have double vision or the examiner sees an eye drift outwar...
Part I: Near point of convergence. Part II: Amplitude of accommodation. Part III: Near heterophoria. Ophthalmic Physiol Opt. 2000;20(3):185–98. Article CAS PubMed Google Scholar Currie DC, Manny RE. The development of accommodation. Vision Res. 1997;37(11):1525–33. Article CAS Pub...
a diverging lens can be used to fix the problem of nearsightedness. as mentioned above, the image was blurry as the light rays were not diverging at the right point, creating a focused image. the rays get focused before it reaches the retina. the convergence of the light rays takes ...