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Practice Lensometer to find the actual prescription of glasses

 




Lensometer is a device that is used to measure the actual prescription of refractive error on which the glasses are made. Using this link you can practice and refine your lensometer skills by accuratly measuring the prescription of the glasses for comfortable eyes.


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The Mittendorf dot

  The Mittendorf dot, determined by William Frederick Mitttendorf, is a congenital vascular abnormality of eye which takes place because of an involutional fault of the anterior terminus of anterior hyaloid artery. It manifests as a focal opacity in the infero-nasal element of the posterior lens capsular surface. It is a scientific version of persistent fetal vasculature (PFV), a spectrum of situations that rise up whilst fetal hyaloid vasculature fails to involute. The Mittendorf dot is concept to be connected to the posterior lens capsular surface itself; current research suggests the opportunity of a retrolental presence of the dot inside the anterior vitreous. A lone Mittendorf dot is a exceptionally benign clinical finding and no inflicting any visual impairment