Tvrda gas-propusna (RGP) kontaktna sočiva Koncepcija
Tvrda gas-propusna (RGP) kontaktna sočiva Koncepcija
Tvrda gas-propusna (RGP) kontaktna sočiva Koncepcija
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Slide 40<br />
<strong>RGP</strong> oblik ivice versus Komfor<br />
• <strong>RGP</strong> <strong>sočiva</strong> sa zaobljenim skvernimzadnjim<br />
ivičnim profilima su komfornija<br />
• Komfor je određen interakcijom ivice <strong>sočiva</strong> sa<br />
kapkom<br />
(La Hood, 1988)<br />
Rigid Gas Permeable Contact Lenses Design<br />
Edge Shape versus Comfort<br />
As a result of studies of comfort versus edge shape it was found that:<br />
<strong>RGP</strong> lenses with rounded and square posterior edge profiles are more comfortable. This<br />
suggests that as long as the apex is not biased towards the anterior surface, the actual<br />
shape is less significant.<br />
Comfort is determined by the interaction of lens edge with the lid and to a lesser extent<br />
the interaction of the lens with the cornea. However when the lids are manually retracted,<br />
the wearer of an <strong>RGP</strong> lens usually reports decreased sensation from the lens.<br />
Oblik ivice versus Komfor<br />
Studije koje su bavile ovim problemom su pokazale:<br />
<strong>RGP</strong> <strong>sočiva</strong> sa zaobljenim skvernimzadnjim ivičnim profilima su komfornija. To sugeriše<br />
da, dokle god apeks nije podešen ka prednjoj površini, aktuelni oblik <strong>sočiva</strong> je manje<br />
značajan.<br />
Komfor je određen interakcijom ivice <strong>sočiva</strong> sa kapkom i manjemobimu interakcijom<br />
<strong>sočiva</strong> sa korneom. Međutim kada se kapak rukom povuče, korisnik <strong>RGP</strong> <strong>sočiva</strong> obično<br />
iskazuje da oseća manju senzaciju od <strong>sočiva</strong>.
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