Lentes Intraoculares
Dr Durval - Cirurgia de Catarata
03dez

Lentes Intraoculares

Redação

As lentes intraoculares substituem o cristalino após a remoção da catarata.

Essas lentes são minúsculas e além de serem tão pequenas são, na maioria das vezes, inseridas dobradas dentro do olho e quando estão lá dentro é que se abrem e são posicionadas no local correto. Para tanto, elas são flexíveis e injetadas com equipamentos cirúrgicos específicos. O fato de serem introduzidas dobradas propicia o menor corte possível na superfície do olho, algo em torno de 2mm. Após se abrirem, ficam com aproximadamente 6mm de diâmetro.

As lentes intraoculares que são implantadas no olho possuem graus muito altos pois o cristalino possui uma lente natural que varia a 22 graus para mais ou para menos. Se uma pessoa tiver o cristalino retirado e não implantar nenhuma lente intraocular, essa pessoa deverá usar um óculos com graus muito fortes como os óculos "fundo de garrafa".

Em alguns casos, as condições do olho impedem uma leitura precisa do grau a ser implantado e, após a cirurgia de catarata, restam graus residuais que somente são compensados de uma ou outra forma:

  • utilizando óculos convencional;
  • implantando uma lente suplementar com grau pequeno e que resolve o grau residual.

Os tipos de lentes intraoculares disponíveis na atualidade são:

  • Lentes Monofocais: lentes para ver a uma só distância (por exemplo, para longe);
  • Lentes para corrigir presbiopia: que podem ser multifocais ou acomodativas;
  • Lentes tóricas: podem ser tanto multifocais quanto monofocais. Tem a função de corrigir o astigmatismo (irregularidades na córnea). Assim como em óculos ou lentes de contato, as lentes tóricas devem ser implantadas com orientação definida para que surta o efeito desejado;

Para todos os tipos de lentes existem tecnologias específicas que são orientadas em consultório, conforme a necessidade de cada caso.

 

 

 

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