Badr University in Cairo (BUC)
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BUC · BIOCHEMISTRY PROJECT

Eyes & Eyelashes

A fun, visual guide to eye anatomy, eyelash structure, healthy habits and screen comfort.

Macro photograph of the human eye, iris, pupil, and eyelashes
Surface anatomy: Iris, pupil, sclera & eyelashes BUC · 2025/2026
01 · Anatomy

Eye & eyelash anatomy

Click any term below each diagram to read its function

Figure 1.1

Human eye — cross-section

Human eye cross-section diagram

How vision works: light enters through the cornea and pupil, the lens focuses it onto the retina, and the optic nerve sends signals to the brain.

Cornea The clear front window of the eye that helps bend incoming light and protects the inner eye.
Figure 1.2

Eyelash & eyelid — follicle view

Eyelash hair follicle and oil glands diagram

Why lashes matter: they help catch small particles and trigger blinking. Follicles produce each lash; nearby eyelid oil glands contribute to tear-film stability.

Hair shaft The visible part of the eyelash above the skin that catches dust and protects the eye surface.
02 · Daily choices

Recommended vs. Not recommended

✓

Recommended — Do this

  • ✓Follow the 20-20-20 rule: every 20 minutes, look 20 feet away for 20 seconds.
  • ✓Blink fully and regularly while using screens.
  • ✓Keep the screen around an arm's length away and slightly below eye level.
  • ✓Adjust brightness, reduce glare and use comfortable room lighting.
  • ✓Take movement breaks, sleep regularly and wear UV-protective sunglasses outdoors.
  • ✓Wash hands before touching eyes; remove makeup gently.
  • ✓Clean contact lenses exactly as directed; never share them.
✕

Not recommended — Avoid this

  • ✕Stare at screens for hours without taking breaks.
  • ✕Rub your eyes or pull your eyelashes.
  • ✕Use screens in a position that causes neck or eye strain.
  • ✕Share mascara, eyeliner, towels or contact lenses.
  • ✕Sleep in contact lenses unless specifically prescribed.
  • ✕Use expired mascara or unapproved oils, glue or home remedies near the eye.
  • ✕Ignore persistent pain, redness, discharge or blurred vision.
Quick screen reset: Look away · Blink slowly 10 times · Relax your shoulders · Stand up and move for a moment.
03 · Build a routine

Simple habits to reduce eye strain

20·20·20
Screen breaks

Every 20 minutes, look at something about 20 feet away for 20 seconds.

10 blinks
Gentle blinking

Try 10 slow, complete blinks when your eyes feel tired or dry.

Regular
Sleep schedule

Keep a consistent sleep routine and aim for enough sleep for your age.

04 · Nutrition

Foods that support normal vision

Food examples Nutrients Role in the body
Carrots, pumpkin and spinach Beta-carotene / vitamin A Vitamin A is essential for normal vision.
Salmon, sardines and walnuts Omega-3 fats Part of a balanced diet; evidence for treating dry eye varies.
Eggs, nuts and seeds Vitamin E, zinc and other nutrients Support normal cell function and general health.
Oranges, berries and peppers Vitamin C and antioxidants Help protect cells from oxidative stress.
Water and varied meals Fluids and micronutrients Support general wellbeing; no food guarantees longer lashes.

A balanced diet supports normal eye function but does not replace an eye examination or treat an eye condition. Avoid high-dose supplements unless advised by a healthcare professional.

05 · Mini game

Eye-care quiz — 5 easy questions!

Test what you learned about the 20-20-20 rule, lens, vitamin A, hygiene, and eyelashes.

Start Quiz Now
06 · Our team

القائمين على هذا العمل

جامعة بدر بالقاهرة · ٢٠ طالب
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٠٢. سيف جمال السيد
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٠٣. احمد السيد حسان
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٠٤. عبدالمنعم احمد الخولي
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٠٥. ريم فتحي عبدالعزيز
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٠٦. ساره ممدوح عمران
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٠٨. عبده صبحي عبدالنبي
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٠٩. شمس السيد صلاح
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١٠. عمر عبد الحليم علي ابوزيد
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١١. سما محمد عبد اللطيف
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١٣. عبدالرحمن إبراهيم عبدالرحمن
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١٤. حنين هاني محمد
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١٥. سما هاني احمد
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١٦. سفيان عماد مصطفى
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١٨. طه اشرف سيد
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١٩. عبد الواحد أحمد عبد الواحد
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٢٠. صفا رجب عبيد
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