Until what age can one wear a patch for my lazy eye?

Try it. At age 33, chances of success are less, but patching your stronger eye will not hurt anything. It used to be thought that amblyopia (lazy eye) could be corrected by patching until age 7. There have been many successes at later ages, but it becomes more difficult. If the lazy eye is deviated, crossing in or out, it will be good to try to strengthen it before surgical options are considered.
Lazy Eye. An eye muscle weakness resulting in an eye that turns inward or outward is known as lazy eye. Patching the stronger eye will cause the weaker eye muscles to work harder. Usually an ophthalmologist will want to see at least 6-12 weeks of diligent patching before considering more invasive treatment such as surgery to correct the weak eye muscle.