The ABO Practice Quizzes are designed to allow you to practice ABO concepts a little every day. To get the best results, we recommend taking one quiz per day for 30 days. A little practice every day is better than a lot of practice all at once!

Each quiz has about 20 questions. The topics covered on the quizzes are:

• Ocular anatomy
• Refractive errors
• Characteristics of plus and minus lenses
• Decentration
• Minimum blank size
• Transposition
• Vertex distance compensation.
• Light theory
• Index of refraction
• ABBE value
• Vocabulary
• Prentice rule
• Spherical equivalent
• Base curve selection.
• Astigmatism
• ANSI standards
• Focal length
• Calculating effective power in given meridians
• Calculating induced prism in compound lenses
• Optical cross.

You will be emailed links to the quizzes after purchase. Access to the ABO Practice Quizzes lasts for 3 months.