Informed consent for cataract surgery: what patients do and do not understand

Area of Science:

• Ophthalmology
• Medical Ethics
• Patient Education

Background:

• Informed consent (IC) is a cornerstone of ethical medical practice, particularly for surgical procedures like cataract surgery.
• Assessing patient comprehension of complex medical information within IC documents is essential for valid consent.

Purpose of the Study:

• To evaluate patient understanding and perceived usefulness of informed consent (IC) for cataract surgery.
• To assess the impact of verbal and written IC on patient recall of information over time.

Main Methods:

• A study was conducted at an academic tertiary care center.
• Multiple-choice questionnaires assessed patient knowledge of cataract surgery details, IC terminology, and opinions on IC usefulness.
• Data were collected preoperatively and postoperatively, with statistical analysis using paired and unpaired t tests.

Main Results:

• A standardized IC discussion significantly improved patient scores (73.4%) compared to a control group (23.4%).
• Patient recall of outcome probabilities decreased postoperatively with verbal IC (61.2% to 44.0%) but improved with take-home written materials (75.0%).
• Twenty-six patients expressed concerns about legal autonomy being waived upon signing consent forms.

Conclusions:

• Patients possess a basic understanding of cataract surgery terminology.
• Standardized IC discussions are effective in enhancing patient education and understanding.
• Written take-home materials can mitigate memory decay of crucial outcome probabilities, reinforcing the importance of comprehensive communication in IC.