👁️ NRA & PRA TEST Negative & Positive Relative Accommodation 🔹 What is NRA? NRA (Negative Relative Accommodation) measures the maximum ability of the eyes to relax accommodation while maintaining clear, single binocular vision. ✔ Plus lenses are added binocularly ✔ Test is done at near (40 cm) ✔ Patient reads near chart. 🔹 What is PRA? PRA (Positive Relative Accommodation) measures the maximum ability of the eyes to stimulate accommodation while maintaining clear, single binocular vision. ✔ M
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