Sure, here is a brief summary of each section of the speech:

I. Introduction

Definition and importance of sunglasses
Brief overview of the history of sunglasses
II. Ancient Times

Evidence of sunglasses use in China and by Inuit people
Depiction of sunglasses in Greek and Roman art
III. The 18th and 19th Centuries

Development of sunglasses as a fashion accessory
Introduction of tinted lenses for glare protection
Popularity among movie stars and celebrities
IV. 20th Century

Mass production of sunglasses after WWII
Emergence of polarized lenses
Advancements in lens technology and frame materials
V. 21st Century

Availability of prescription sunglasses
Popularity of designer sunglasses
Increase in demand for eco-friendly and sustainable sunglasses
VI. Conclusion

Summary of the history of sunglasses
Significance of sunglasses in today's society
Final thoughts and appreciation for the evolution of sunglasses.
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