At Berkeley, we run on semester system, which means most of the grades are dependent on a month of midterms/quizzes/practicals and finals week (similar to undergrad semester systems) consisting of finals + practicals. For each semester (in the first year), expect ~1 month of not much testing, followed by 1-2 tests per week for a month, followed by another month of not much, then another month of lots of studying for finals. Tests at Berkeley are a mixture of multiple choice and short essays. Some classes only have MC, some only have short essays, but most are a combination.
1st year is pretty chill, so everyone has free time to play intramural sports, go to football games, bar hop, etc. We take less basic science courses compared to many other optometry schools because they were required prerequisites for admission.
2nd year, on other hand, is much more work than 1st year, but very doable. 2nd year is just tougher because on top of normal coursework/tests/practicals, we also do full exams on patients in team care 7x/semester, intern in contact lens clinic 2x/semester, and intern in eye wear 3x/semester. There's usually 1-3 tests a week (during midterm season), and very very rarely are any on the same day.
Hope that helps.