Research Article
Refractive Development in the “ROP Rat”
Table 1
Parameters for refractive state estimation in rat eye.
| Category | Parameters | Symbol | Homogeneous lens model | Core lens model |
| Refractive indices* | Air | n1 | 1.000 | 1.000 | Cornea | n2 | 1.380 | 1.380 | Aqueous and vitreous humors | n3, n7 | 1.337 | 1.337 | Lens cortex | n4, n6 | NA | 1.390 | Lens core | n5 | 1.683 | 1.500 |
| Axial positions (m) | Anterior cornea surface | A1 | Measured from MRI | Measured from MRI | Posterior cornea surface | A2 | Scaled† | Scaled† | Anterior lens surface | A3 | Measured from MRI | Measured from MRI | Anterior core lens surface | A4 | NA | Scaled† | Posterior core lens surface | A5 | NA | Scaled† | Posterior lens surface | A6 | Measured from MRI | Measured from MRI | Retina | A7 | Measured from MRI + 130 μm | Measured from MRI + 130 μm |
| Radii of curvature (m) | Anterior cornea surface | rC1 | Measured from MRI | Measured from MRI | Posterior cornea surface | rC2 | Scaled† | Scaled† | Anterior lens surface | rL1 | Measured from MRI | Measured from MRI | Anterior core lens surface | rLC1 | NA | (A5 − A4)/2 | Posterior core lens surface | rLC2 | NA | (A5 − A4)/2 | Posterior lens surface | rL2 | Measured from MRI | Measured from MRI |
| Dioptric powers (D) | Cornea | FC | Equation (1) | Equation (1) | Lens | FL | Reduced equation (2) (FLhmgns) | Equation (2) (FLcore) | Whole eye | FE | Equation (3) (FEhmgns) | Equation (3) (FEcore) | Refractive state | | Equation (4) (hmgns) | Equation (4) (core) |
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*Refractive indices are adopted from Hughes (1979). †Parameters were obtained by scaling linearly to the values obtained from Hughes’ study.
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