What is the posterior lens suture shape?

What is the posterior lens suture shape?

• A. Inverted Y
• B. Upright Y
• C. Straight line
• D. Circular

Answer: (A)

The sequence of lens fiber growth creates sutures where the ends of elongated fibers meet at the center. On the posterior surface, the way these ends converge from different directions forms a three-armed pattern that points downward toward the posterior pole, producing an inverted Y shape. This orientation is a classic feature of the posterior suture, while the anterior surface shows an upright Y due to the opposite arrangement of fibers. A straight line or circular pattern wouldn’t reflect how the fiber ends meet to close the posterior surface, and an upright Y would describe the anterior, not the posterior, suture.

The sequence of lens fiber growth creates sutures where the ends of elongated fibers meet at the center. On the posterior surface, the way these ends converge from different directions forms a three-armed pattern that points downward toward the posterior pole, producing an inverted Y shape. This orientation is a classic feature of the posterior suture, while the anterior surface shows an upright Y due to the opposite arrangement of fibers. A straight line or circular pattern wouldn’t reflect how the fiber ends meet to close the posterior surface, and an upright Y would describe the anterior, not the posterior, suture.