Objectives: To determine the association between attention span and year of study of dental students. To identify the factors affecting the attention span. Methods: A cross-sectional study at CMH Lahore Medical College & IOD from Oct to Dec 2024, involved 155 students from 1st to 4th year BDS, using a Stratified Random Sampling technique. The study used demographic data and an online Attention Control Scale (ACS) questionnaire, excluding students with low attendance or attention deficit hyperactivity disorder ADHD, and IBM SPSS 26 used for descriptive and inferential statistics. Results: The mean age of respondents were 155(21.1+_1.68), and 63.2% of them were female. The men's average score was (50.31±6.37), while women's average was (45.12±7.12). Second-year students scored the lowest (58±7.02) and fourth-year students earned the highest (75.4 ±6.67) on the "Attention Control Scale (ATS)". Significantly influenced internal factors are emotions about 52.25%, while nearby noises (79.35%) and classroom environment (74.83%) were additional external variables. 73.54% of students struggled listening to a one-hour class, while 80.64% preferred PBL and small group discussions as teaching methods. Conclusion: Students’ attention span is affected by both internal and external factors, including emotions and learner type, as well as by traditional lectures and long-duration lectures. External effects include the length of the course and noise in the surroundings.