The I-Terminal: A Valuable Aid in Sixth-Generation Progressive Lens Fitting for Bifocal Lens Wearing Patients

Abstract

Presbyopic visual comfort has improved considerably with the evolution in the design and manufactureof progressive lenses. Adapting to these immediately requires a proper choice of progressivelens and making accurate measurements, which the I-Terminal allows. <em><strong>Objective:</strong></em> To evaluate thesixth-generation progressive lens fitting for presbyopic patients who have worn traditional bifocallens for over two years, using the I-terminal for taking measurements. <em><strong>Method:</strong></em> A descriptiveobservational study with a sample of 20 patients who have used bifocals for over two years. Thecomputer-I-Terminal Carl Zeiss Vision house was used for taking measurements of the adaptationto progressive lenses. The adaptation was evaluated using the survey afa2’q y afa4q. <em><strong>Results:</strong></em> Wefound that 100% of the patients had an immediate adaptation to progressive lenses. <em><strong>Conclusion:</strong></em> There was an immediate adaptation to progressive lenses and taking measurements with the ITerminal.Also, in assessing vision and comfort, it was demonstrated that patients using bifocalsfor a long time are good candidates for progressive lenses.