Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Idiopathic juxtafoveal retinal telangiectasia ?
    ### Response:
    Idiopathic juxtafoveal retinal telangiectasia (IJT) refers to a group of eye conditions characterized by dilated or twisting blood vessels (telangiectasia) and defective capillaries (tiny blood vessels) near the fovea in the retina. The fovea has the biggest number of special retinal nerve cells, called cones, which enable sharp, daytime vision.
    