Which practice is associated with inducing warpage in GP lenses?

Study for the NBEO Physiological Optics Test. Prepare with flashcards and multiple-choice questions, each question has hints and explanations. Ace your exam!

Multiple Choice

Which practice is associated with inducing warpage in GP lenses?

Explanation:
Warpage happens when a GP lens’ shape is distorted by stress, especially from excessive mechanical manipulation. Rubbing a rigid lens with fingertips—often with nails or heavy pressure during cleaning—causes flexing and micro-distortion of the posterior surface, changing the lens curvature. That stress-induced deformation is what we call warpage, and it can alter fit and keratometry readings. Regular maintenance, proper cleaning, and gentle handling minimize this risk because they avoid the excessive force and bending that warp the lens.

Warpage happens when a GP lens’ shape is distorted by stress, especially from excessive mechanical manipulation. Rubbing a rigid lens with fingertips—often with nails or heavy pressure during cleaning—causes flexing and micro-distortion of the posterior surface, changing the lens curvature. That stress-induced deformation is what we call warpage, and it can alter fit and keratometry readings. Regular maintenance, proper cleaning, and gentle handling minimize this risk because they avoid the excessive force and bending that warp the lens.

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