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Fórmulas Biometría

Calculators: IOL, LRI, ISCRS


Cálculo de lente por Red de Función de Base Radial (RBF calculator, Dr Hill)

  • RBF calculator - It is based on the network of radial basis function, a method developed in the late 80s as “artificial neuron”. It is a method “forward”, in which input data are entered, assigning specific weight are processed and an output value is obtained. The artificial neuron is this hidden layer in which the specific weight is considered. Perhaps the most special feature is that this artificial neural network is capable of self learning and therefore as cases of surgeries are introduced, future predictions will be more tight.

Cálculo de lente por fórmulas de tercera generación (SRK/T, Holladay I, Haigis, Hoffer Q)

Biometría tras cirugía refractiva

Calculadoras de lentes tóricas

Cálculo para reposicionar LIO tórica tras implante con residual

Incisiones limbares relajantes

Biometría mediante Ray tracing

Cálculo potencia LIO en sulcus (Dr. Hill)

Calculadora de Barrett para potencia esférica de lente. Interesante para ojos largos

Ajuste LA de IOLmaster para miopías > 25mm (Wang, 2011 JCRS)

  • Holladay1 optimized AL=0.8289×IOLMaster AL+ 4.2663
  • Holladay1 optimized AL=0.8289×IOLMaster AL+ 4.2663
  • Haigis optimized AL=0.9286×IOLMaster AL+ 1.562
  • SRK/T optimized AL=0.8544×IOLMaster AL+ 3.7222
  • Hoffer Q optimized AL=0.853×IOLMaster AL+ 3.5794

Cálculo potencia LIO PiggyBack

Underpowered Pseudophake (Hyperope)

  1. Short Eye (<21mm): Power = (1.5 x SE) + 1
  2. Average Eye (22--26mm): Power = (1.4 x SE) + 1
  3. Long Eye (>27mm): Power = (1.3 x SE) + 1
Overpowered Pseudophake (Myope)
  1. Short Eye (<21mm): Power = (1.5 x SE) - 1
  2. Average Eye (22--26mm): Power = (1.4 x SE) - 1
  3. Long Eye (>27mm): Power = (1.3 x SE) -1
  4. Vergence formula (Holladay JT. JCRS 1997)
Cálculo basado en la fórmula de vergencia
enlace al calculator excel (Dr. Hill)