Valuing condition-specific health states using simulation contact lenses.

Area of Science:

• Ophthalmology
• Health Economics
• Psychophysics

Background:

• Age-related macular degeneration (ARMD) significantly impacts vision and quality of life.
• Accurate measurement of health state utilities is crucial for economic evaluations and patient-centered care.
• Existing preference-based measures may not fully capture the lived experience of visual impairments like ARMD.

Purpose of the Study:

• To assess the feasibility of using contact lenses to simulate ARMD visual impairment.
• To compare utility values derived from simulated ARMD states with those from actual ARMD patients.
• To evaluate the utility of simulation in preference elicitation for complex health conditions.

Main Methods:

• Healthy participants (n=108) used contact lenses to simulate three ARMD visual states.
• Utility values were collected using the time trade-off (TTO) method.
• Results were compared with generic preference-based measures (Health Utilities Index 3, EQ-5D) and patient TTO values (n=209).

Main Results:

• Simulated ARMD states showed a significant relationship between visual acuity and TTO values.
• Simulated values differed significantly from patient-derived TTO and generic measures.
• Sociodemographic factors had minimal impact, though baseline TTO was associated with simulated TTO values.

Conclusions:

• Contact lens simulation provides distinct health state values for ARMD, potentially larger than generic measures.
• Simulation methods can enhance preference elicitation for conditions difficult to describe.
• This approach offers a complementary tool to standard methods for understanding population preferences in visual impairment.