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Agujero o desgarro en la retina
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Agujero o desgarro en la retina

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Agujero o desgarro en la retina

En el interior del globo ocular existe un gel conocido como vìtreo, esta especia de gelatina rellena las dos terceras partes del globo ocular y le da su forma al globo ocular. El vìtreo es una masa òpticamente transparente y tiene como fucniones amortiguamiento, nutriciòn de capas internas de la retina y regulaciòn de la temperatura del globo ocular. Por otro lado, existe la retina que es una delgada y fina capa comparada con una tela, que tapiza al globo ocular en su interior y si comparamos el globo ocular con una càmara fotogràfica, la retina serìa la pelìcula donde se imprimen las imàgenes. Ahora anatòmicamente, el vìtreo(gel) se encuentra fìrmemente adherido a la retina en varios puntos como son en la salida del nervio òptico, en los vasos sanguìneos de la retina y finàlmente en zonas perifèricas de la retina, conocidas como "extrema periferia de la retina" o tambièn conocida como base del vìtreo. Ahora habiendo explicado esto, trataremos de hablar sobre el agujero. Con el paso del tiempo en muchas personas, el vìtreo sufre dos procesos degenerativos que se consideran normales. Estos se llàman sìnquisis y sinèresis, que son fenòmenos de licuefacciòn del vìtreo y contracciòn del mismo. Cuando se presenta la contracciòn del mismo, se puede presentar una situaciòn por demàs benigna conocida como desprendimiento de vìtreo posterior, que consiste en el gel(vitreo) de desprende de la retina, al cual se encontraba adherido, dejando un espacio virtual entre el vìtreo y la retina. En el momento de presentarse el desprendimiento de vìtreo posterior se perciben manchistas oscuras mòviles conocidas como flotantes de vìtreo.

Estos flotantes pueden tener formas caprichosas como "telarañas", "moscas volantes" etc. y generàlmente antes de la percepciòn de estos flotantes de vìtreo, se puede percibir "flashasos" que se producen por las tracciones que va generando el vìtreo sobre la retina antes de desprenderse. Sin embargo en algunas ocasiones principàlmente cuando la retina en la extrema periferia es muy delgada por ejemplo en el caso de los pacientes miopes, el desprendimiento de vìtreo posterior debido a su tracciòn puede liteàlmente "arrancar" un pequeño fragmento de retina, formando un agujero o desgarro en la misma. Cuando se ha presentado un desgarro en retina, definitìvamente debe realizarse un tratamiento preventivo de fotocoagulaciòn con Rayo làser, rodeando la zona del desgarro o agujero. En este caso, el làser genera un efecto tèrmico que genera adherencia de tejidos, sellando el desgarro resolviendo el problema, ya que de no aplicarse el tratamiento existe el riesgo de desarrolla ahora un desprendimiento de retina, situaciòn sùmamente grave y que pone el peligro la visiòn. Si sigues pèrcibiendo la manchita, no es ni por el agujero ni por el làser, sino por que a pesar del tratamiento los flotantes de vìtreo persisten un tiempo para posteriormente desaparecer la percepciòn de los mismos.Por otro lado el agujero puedo haber liberado algunas partìculas de epitelio pigmentario de la retina que es un polvillo oscuro que se puede percibir un tiempo para desaparecer con el tiempo.

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