Lens with reduced thickness and optical unit having the same

A lens adapted to control distribution of light emitted by a light source, said lens comprising:

• a main body including
• a curved light-projecting surface that is distal from the light source, and
• a light-incident surface that is opposite to said light-projecting surface, that is proximate to the light source, and that includes a plurality of curved sections facing the light source, and a plurality of connecting sections, each of said connecting sections interconnecting two adjacent ones of said curved sections, and having opposite first and second connection sides that are respectively connected to said two adjacent ones of said curved sections,
• wherein a distance between said first connection side and the light source is not equal to a distance between said second connection side and the light source.