HERE IS THE SUGGESTED ORDER OF BOOK READING:
Tim Root's books are a good starting place. While they look like silly cartoon books, many residents and young faculty recognize these books as great ways to quickly tackle the absolute fundamentals before moving on to "more substantive" books.
Note: Tim Root's Videos are an adjunct to the books. Watch them as you read through each chapter.
Next, Ophthalmology Secrets is a question-and-answer style book that can be read during your clerkship and take things up a notch from Tim Root's book.
Consider either Wills Eye Manual or Mass Eye & Ear Ophthalmology as give you a quick reference. Note that many residency programs provide this resource for free.
Many experts suggest starting going with AAO's Basic Ophthalmology textbook. This reinforces content that you can learn through Tim Root's book and Ophthalmology Secrets. In my opinion, those were easier to get through, more enjoyable, and more written for students going into ophthalmology.
Lastly, if you want to open your wallet (or have Clinical Key access), Kanski's Ophthalmology or Spalton's Atlas are well-recommended atlases.