Clinical Evidence
Review our scientific studies demonstrating the visual comfort and clarity delivered by Sequel
Built on evidence, not assumptions.
Modern screen work places sustained demands on the visual system, including focusing effort and eye alignment. The studies summarized here were designed to evaluate how Sequel lenses perform in real-world or controlled-use settings, with attention to comfort, clarity, and symptoms commonly associated with digital eye strain.
The summaries below are intentionally concise. Each white paper includes full study details, methodology, participant information, outcomes, and limitations.
EXPLORE THE STUDIES
The aim of this prospective clinical study is to evaluate the real-world performance of Sequel 38 and Sequel 67 lenses.
What was studied
- Subjective comfort and clarity ratings across seven task domains (Likert scale)
- Overall satisfaction and willingness to recommend (Likert scale)
- Net Promoter Score (NPS) across all evaluated domains
Methodology Snapshot
- Study type: Prospective clinical study
- Lens design tested: Sequel 38 for participants aged 21-35 and Sequel 67 for participants aged 36-45
- Participants: 56 symptomatic computer users, aged between 21 and 45 years
- Duration: 4 weeks
- Digital eye strain symptoms determined by Computer Vision Syndrome Questionnaire (CVS-Q) scores.
Result Highlights
4/5
users find the lenses very comfortable for digital tasks
91%
of patients reported a reduction in their digital eye strain symptoms
This prospective clinical study evaluated the digital eye strain, comfort and visual clarity in users wearing Sequel PAL lenses.
What was studied
- Change in digital eye strain symptoms when wearing Sequel PAL lenses
- Visual comfort and clarity Net Promoter Scores at week 6
Methodology Snapshot
- Study type: Prospective clinical study
- Participants*: 29 progressive lens wearers with a minimum of 4 hours of digital device use per day and aged 40+ (*more inclusion criteria in the full paper)
- Duration: 6 weeks
- Lens design tested: Sequel PAL
- Digital eye strain symptoms determined by Computer Vision Syndrome Questionnaire (CVS-Q) scores.
Result Highlights
71%
overall reduction in symptom score
83%
of participants reported being very comfortable performing their everyday routine tasks
76%
of participants reported no eye fatigue by the end of the day
