Optics and the human visual system
Optics is often overlooked in our frameworks, but it easily complements the study of human vision and has connections to the sense of hearing. Check out this Optics slideshow: Optics is Light Work
>Draft Optics and Vision Curriculum Guide (Gr.4/5) 
>Optics and Vision Resources and Links (HTML)
>Lenses 
>Optics Vocabulary for the Teacher
>Optics Vocabulary for Primary Students
>Vision/Eye Vocabulary
>FAQ of Eye Problems (K-5 version)
>Parts of the Eye Study Diagram
>Parts of the Eye Label and Color Worksheet