en بینایی سنجی Optometry پژوهشي Research <strong>Background and Objectives</strong>: Currently, there is no standard way to check the optimal fitting of Progressive Addition Lenses (PAL) and visual acuity variations when looking at different objects according to PAL&rsquo;s production mechanism. We need a standard method to control PAL subjectively according to research on its monitoring. These topics are checked in this study.<br> <strong>Methods: </strong>Two charts was designed for far and near distances using Persian letters and sentences with a logarithmic scale. Twelve subjects wearing PAL sat at 3 m and 30 cm distances, respectively, from far and near charts, and their visual acuity at Primary Position (Pp) and 15&deg; up and down gazes, and 30&deg; right and left gazes with single and progressive lenses were measured. To evaluate the stability of sharpness, measurements were repeated 5 minutes later. Also, to check the accuracy of vision, the measurements were compared to measurements recorded with a portable Rosenbaum pocket vision screener and E chart.<br> <strong>Results:</strong> The correlations between Persian and E charts with PAL were confirmed in all gazes except pp. Mean visual acuity in all gazes except pp and 15&deg; up gaze showed the difference in these charts. There are also mean differences in all gazes except 15&deg; down gaze in near vision.<br> <strong>Conclusion:</strong> Persian and Electronic charts are helpful to evaluate the visual acuity of those wearing PAL and fix the above-mentioned problems. Visual acuity, Charts, Progressive 0 0 http://fdj.iums.ac.ir/browse.php?a_code=A-10-28-8&slc_lang=en&sid=1 Sahar Bache Sagha s2sagha@gmail.com 10031947532846002383 10031947532846002383 No Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. Payam Nabovati nabovatipayam@yahoo.com 10031947532846002384 10031947532846002384 No Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. Ebrahim Jafarzadehpour jafarzadehpur.e@iums.ac.ir 10031947532846002385 10031947532846002385 Yes Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.