The use of hybrid lenses in management of the irregular cornea

The effect of keratoconus on the structural, mechanical, and optical properties of the cornea

“…At later stages, when the biomechanical stability of the cornea decreases, use of rigid gas-permeable lenses may provide better mechanical support. Hybrid lenses are a popular option, since they are rigid in the middle and soft on the edges, thus providing the comfort of a soft lens (Tsubota et al, 1994;Rubinstein and Sud, 1999). Despite the advantages of contact lenses in treating keratoconus, there are a few associated complications.…”

Synthesis and Characterization of Mesoporous Hybrid Silica-Polyacrylamide Aerogels and Xerogels

“…-113 ppm correspond to Q 4 -Si (i.e. Si(OSi≡) 4 ). The quantification of these peaks (Table 2) reveals very similar values coupled with the domination of Q 3 and Q 4 sites (greater than 94%, with Q 4 always greater than 52%) and thus the three dimensional character of the silica network.…”

“…These hybrids are found to be promising materials for various applications such as some optical components [3], contact lenses [4], insulating materials in microelectronic industry [5], anticorrosion and resistant coatings [6], host materials for chemical sensors [7] and biological molecules [8]. Among others, silica is a widely involved inorganic material in the synthesis of these hybrids.…”

Lente de contato de material híbrido em pacientes com ceratocone e astigmatismo miópico composto

“…Não era um novo material e sim a utilização de uma lente de contato que continha materiais em estados físicos diferentes. Tais lentes foram chamadas de lentes de contato híbridas (5) . As investigações nesse sentido levaram ao desenvolvimento dos polímeros flexíveis.…”