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In the name of God RGP Lens Design, Fitting  and Evaluation   By : hossein  alimirzaie optometrist
Methods  to correct  vision: ,[object Object],[object Object],[object Object],[object Object]
Optical methods: ,[object Object],[object Object],[object Object]
Optical methods: ,[object Object],[object Object],[object Object],[object Object],Contact   lenses :
 
Disadvantages of Soft Contacts vs.. Hard ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
BENEFITS OF RGP LENSES ,[object Object],[object Object],[object Object],[object Object],[object Object]
2. Excellent Eye Health ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
4. Ease of Handling ,[object Object],[object Object],[object Object],[object Object]
6. Slow Down Myopia Progression ,[object Object]
APPLICATIONS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
EMPIRICAL FITTING   ,[object Object],[object Object]
FLUORESCEIN EVALUATION   ,[object Object]
Omitting this step can result in any one or more of the following problems : ,[object Object],[object Object],[object Object],[object Object]
Alignment fit : ,[object Object],[object Object],[object Object]
One should always strive for an alignment fitting relationship  ,[object Object],[object Object]
Figure 1 : An apical bearing fitting relationship
Figure 2 : An apical clearance, low edge clearance fitting relationship
Figure 3 : A high edge clearance fitting relationship
 
Fluorescein evaluation of the lens-to-cornea fitting relationship should be performed at both the fitting and all progress evaluation visits.
[object Object]
LENS DESIGN PHILOSOPHY ,[object Object],[object Object],[object Object]
The overall diameter and optical zone diameter of a rigid lens are typically obtained by considering the following variables: ,[object Object],[object Object],[object Object]
 
 
a. Palpebral Aperture Size(PAL) .  Normal PAL values range between 9mm-10.5mm. In most lid-to-cornea relationships there is, at minimum, slight overlap of the lids over the limbus.
Figure 4 : A lid attachment fitting relationship
c. Corneal Curvature .  ,[object Object],[object Object]
2. Base Curve Radius .  ,[object Object],[object Object]
 
[object Object],[object Object]
3. Peripheral Curve Radii and Width .  ,[object Object],[object Object]
4. Center Thickness .  ,[object Object],[object Object]
When making lens design changes, it is important that this change is significant enough to result in an improvement in the lens-to-cornea fitting relationship
Power   ,[object Object],[object Object],[object Object]
 
به  امید موفقیت وسربلندی شما

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fitting RGP lenses

  • 1. In the name of God RGP Lens Design, Fitting and Evaluation By : hossein alimirzaie optometrist
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  • 17. Figure 1 : An apical bearing fitting relationship
  • 18. Figure 2 : An apical clearance, low edge clearance fitting relationship
  • 19. Figure 3 : A high edge clearance fitting relationship
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  • 21. Fluorescein evaluation of the lens-to-cornea fitting relationship should be performed at both the fitting and all progress evaluation visits.
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  • 27. a. Palpebral Aperture Size(PAL) . Normal PAL values range between 9mm-10.5mm. In most lid-to-cornea relationships there is, at minimum, slight overlap of the lids over the limbus.
  • 28. Figure 4 : A lid attachment fitting relationship
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  • 35. When making lens design changes, it is important that this change is significant enough to result in an improvement in the lens-to-cornea fitting relationship
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  • 38. به امید موفقیت وسربلندی شما