Ophthalmology Which of the following strength of xylocaine is used as topical anaesthetic for tonometry? A 4% xylocaine B 3% xylocaine C 2% xylocaine D 1% xylocaine 💡 Explanation Which of the following strength of xylocaine is used as topical anaesthetic for tonometry? ✓ Correct Answer: A. 4% xylocaine