1. INTRAOCULAR LENS IMPLANT System Description and Diagram (task 2)
Amir Mustakim Ab Rashid
Keerthana a/p Rangasamy
Nurdania Abd Rahman
Nur Nadhirah Binti Abdul Hamid

2. Contents System descriptions Input/output System Process
Performance testing

3. System Descriptions
Intraocular lenses (IOLs) are medical devices that are implanted inside the eye to replace the eye's natural lens when it is removed during cataract surgery
IOLs also are used for a type of vision correction surgery called refractive lens exchange
The best type of the IOLs is depend on the patient's need

4. System Block Diagram
reciprocal of the focal length (in metres) of a given lens
diophtre
Lens refracts light onto the retina
Light
Input
process
Onput

5. IOLs Material and Design
Most of the IOLs is made up of silicone or acrylic (PMMA)
Coated with a special material (UV light-blocking chromophores) for eyes protection from ultraviolet light
Main objectives : low degree of postoperative inflammation, reduce posterior capsule opacification (PCO) problem, easy to handle
Production process should be simple to make affordable

6. Plate haptic
Loop haptic

7. Special design

8. INPUT AND OUTPUT Clear visions Cloudy visions (cataracts)
IOL Implants (Cataracts Surgery)
complications

9. INPUT
Patients with cataracts (cloudy lens)
Refractive lens exchange
Cloudy/blurry visions
PROCESS
Cataracts surgery ( IOL Implanted)
OUTPUT
New lens implanted (artificial)
Clear visions restored ; might be complications occur
Visions are depends on type of lens implanted

10. Monofocal lens : one focusing distance; near, far, intermediate

11. Multifocal lens : can focus to more than one distance (near, far)

12. Toric lens : treat cataracts, reduce astigmatism

13. Accommodative lens : can move and focus on various distance

14. Complications :
Posterior capsule opacity (PCO)
Intraocular lens dislocation
Eye inflammations
Light sensitivity
Macular edema (swelling on central of retina)
Ocular hypertension ( elevated eye pressure)

15. SYSTEM PROCESS Cataract Removal IOL is implanted Vision is restored 23 1
Cataract Removal
IOL is implanted
Vision is restored

16. System Process

18. IOL Preloaded / Delivery System

24. References