For someone who previously purchased Orascoptic loupes, I must say Lumadent Ergoprism loupes are definitely up to par with the quality of the product and clarity of the telescope. I was thoroughly impressed by the loupe's ability to help me maintain proper ergonomics. I was also a bit skeptical about measuring myself remotely, but my loupes had no issues when they came in. Unfortunately, I could not adjust properly to the wider field of vision on the Ergoprism. Luckily the customer service agents were always available to accommodate my issues. I'd definitely recommend Ergoprism Lumdadent loupes to any clinician looking to practice with perfect ergonomics.