Don't just get it right, understand why.

OptoPrep supplies you with detailed answer explanations for every question. Right, wrong or best guess - you will master the material by knowing why right answers are correct and wrong answers are not.

Part I Features

1,600+ unique questions2,000+ unique questions with explanations
Each question is repeate to ensure absorptionQuestions are evenly divided between Practice and Exam mode so that you may study questions at your own pace or with timed exams
Detailed answer explanationsDetailed answer explanations for every question to help you comprehensively understand not just which answer is correct but why
In depth statisticsIn depth statistics to track your progress
Mobile optimizedNEW Study on your computer or prep for Part I of the NBEO® on your smartphone or tablet with our iOS and Android apps
Timed examsTimed exams allow time management to be practiced
Format simulates the actual NBEO examFormat simulates actual NBEO® exam
Unlimited review with Pile of DoneNEW Stay fresh on your Part I exam prep with the Pile of Done - never-ending random question review in a slideshow-like format
PowerPagesPowerPages help you review key components on board topics
PowerpixPowerPix help you visually review ocular conditions in a flash
Content is written by specialistsContent is written by specialists and educators in the field
Answer choices are randomizedAnswer choices are randomized to avoid memorization of repeated questions
Content is peer-reviewedContent peer-reviewed and sent through a rigorous copy editing process
OptoPrep GuaranteeStudy with confidence with the OptoPrep Guarantee

What to Expect

The Part I Examination, also known as "Applied Basic Science" (ABS), is taken by third-year optometry students enrolled in their spring semester. The exam is presented in a computer-based format and consists of two sections, each containing 185 questions for a total of 370 questions (350 questions will be scored, the remaining 20 questions are unscored pre-test items). Students have four hours to complete each section and the exam is administered during a single day.

Questions presented on the Part I exam are meant to test the underlying basic concepts necessary to enter the clinical practice of optometry, and most ABS items reference a clinical condition, either explicitly or implicitly. Additionally, a large percentage of items on the ABS exam require students to choose the single best or correct answer. However, approximately 15% of your Part I questions will be presented as Multiple Response (MR) items in which you will be provided between four and seven possible answer choices. These questions each have between two and four correct answers, and you will be required to select ALL of the correct answers in order to receive credit; no partial credit will be awarded.

To learn more about the NBEO® Part I ABS Examination, please visit the NBEO® website at Additional information can be found on the American Optometric Student Association website at

You may view the Examination Content Matrix covered on the exam, as provided by the National Board of Examiners in Optometry (NBEO).


OptoPrep was a lifesaver because it provided full detailed explanations and tons of practice questions. It is very helpful after a long day of clinic and downtime to do the questions. I love how they divided the subjects so you can work on your weaknesses or increase your strengths. I feel very prepared after finishing all of the questions from OptoPrep and it helped me pass NBEO Part I the first time around.


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