A scope is only as good as its mount.
The manual explains that the ocular lens (the one near your eye) is adjustable for your vision. bushnell 3-9x40eg manual
While the official Bushnell 3-9x40eg manual tells you to "keep lenses clean," a long-term owner should follow this schedule: A scope is only as good as its mount
One of the most common user errors is failing to set the diopter correctly. The manual dedicates a critical Step 1 to this process, which many skip: Repeat until groups are centered
The manual warns: If you adjust the eyepiece while looking at a target, your eye will automatically compensate, causing eye strain and fuzzy images later.