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| Both sides previous revision Previous revision Next revision | Previous revision | ||
| silsoft_contact_lenses [2026/07/27 12:59] – [SilSoft Super Plus] Scott Larson | silsoft_contact_lenses [2026/08/06 11:57] (current) – Scott Larson | ||
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| ====== SilSoft Contact Lenses ====== | ====== SilSoft Contact Lenses ====== | ||
| * See [[calculating_contact_lens_power_aphakia|How to Calculate Contact Lens Power in Aphakia]] | * See [[calculating_contact_lens_power_aphakia|How to Calculate Contact Lens Power in Aphakia]] | ||
| - | ====SilSoft Apakic=== | + | =====SilSoft Apakic==== |
| * Base Curves: 7.5, 7.7, 7.9, 8.1, 8.3 mm | * Base Curves: 7.5, 7.7, 7.9, 8.1, 8.3 mm | ||
| * Diameters: 11.3 mm, 12.5 mm | * Diameters: 11.3 mm, 12.5 mm | ||
| - | * Powers: +11.5D to +20.00D (1.00 D steps) | + | * Powers: +12.00 to +20.00D (1.00 D steps) |
| - | ====SilSoft Super Plus==== | + | =====SilSoft Super Plus===== |
| * Base Curves: 7.5, 7.7, 7.9 mm | * Base Curves: 7.5, 7.7, 7.9 mm | ||
| * Diameter: 11.30 mm | * Diameter: 11.30 mm | ||
| Line 15: | Line 15: | ||
| * +32.00 | * +32.00 | ||
| - | ===Fitting=== | + | ====Fitting==== |
| - | ^Average K (D) ^Radius of Curvature (mm) ^Suggested SilSoft BC ^ | + | ===Base Curve=== |
| - | |≥ 45.0 D |≤ 7.50 mm |7.5 mm (steepest)| | + | |
| - | |43.0–44.9 D |7.50–7.85 mm |7.7 mm| | + | |
| - | |≤ 42.9 D |≥ 7.86 mm |7.9 mm</ | + | |
| - | ===Ordering=== | + | To convert K readings to curvature in mm use this formula: |
| + | $$r = \frac{337.5}{K}$$ | ||
| + | |||
| + | Where: | ||
| + | |||
| + | * **r** = radius of curvature (mm) | ||
| + | * **K** = keratometry reading (diopters) | ||
| + | * **337.5** = derived from the standard keratometric refractive index (n = 1.3375), where 337.5 = (1.3375 − 1) × 1000 | ||
| + | <WRAP round box 60%> | ||
| + | ^ Average K (D) ^ Radius of Curvature (mm) ^ Suggested SilSoft BC ^ | ||
| + | | ≥ 45.0 D | ≤ 7.50 mm | 7.5 mm (steepest) | ||
| + | | 43.0–44.9 D | 7.50–7.85 mm | 7.7 mm | | ||
| + | | ≤ 42.9 D | ≥ 7.86 mm | 7.9 mm (flattest) | ||
| + | </ | ||
| + | **Age-Based Corneal Curvature** | ||
| + | * Newborns (0–2 weeks): Mean K ~49 D (r ≈ 6.9 mm), rapidly flattening to ~46 D by 8 weeks and ~44 D by 12 weeks | ||
| + | * 0–2 years: Pooled mean corneal radius is 7.41 mm (~45.5 D), which is steeper than older children | ||
| + | * 2–4 years: Mean K ~43.7 D (r ≈ 7.72 mm), approaching adult values | ||
| + | * By age 3: Corneal curvature generally reaches the adult range (~43–44 D) | ||
| + | |||
| + | ===Power=== | ||
| + | [[calculating_contact_lens_power_aphakia|Aphakic Contact Lens Power Calculators]] | ||
| + | ====Ordering==== | ||
| [[https:// | [[https:// | ||
| + | |||
| + | ====Solution==== | ||
| + | * [[https:// | ||
| + | * [[https:// | ||
| ====B&L Customer Assistance program==== | ====B&L Customer Assistance program==== | ||
| * Provides free or reduced cost lenses for patients at or below the federal poverty level | * Provides free or reduced cost lenses for patients at or below the federal poverty level | ||
| * [[https:// | * [[https:// | ||
| - | ====Resources==== | + | =====Resources===== |
| * {{:: | * {{:: | ||
| * {{:: | * {{:: | ||