Abstract: in low and moderate myopia, the fundus is generally unchanged or leopard shaped, myopic solitary spot, and in high myopia, the temporal or peripheral annular choroid atrophy of the optic nerve papilla, macular degeneration, bleeding Fuchs (Fuchs) macula, posterior scleral staphyloma, and prone to retinal holes and retinal detachment. When the eyeball is adjusted and stationary, the equal light from 5 meters away passes through the refraction of the eye, and the focus just falls on the retina, which can form a clear image. The eye with this refraction state is called emmetropia. Its focus falls in front of the retina and cannot be accurately on the retina Forming a clear image is called axial myopia. It has a high adaptability to the scattered light from nearby targets. As long as the target moves to a certain distance, it can obtain clear vision. Therefore, myopia can be corrected by concave spherical lens because it can see the target clearly at a short distance and blurred at a long distance., Clinical manifestations:, 1 The far vision is decreased and the near vision is normal;, 2. Visual fatigue;, 3. Exophoric exotropia or co rotational exotropia can occur. Most strabismus eyes are one with high degree of myopia;, 4. People with high myopia often have vitreous liquefaction and turbidity, complicated with cataract, and consciously feel the dark shadow fluttering in front of their eyes or vision loss;, 5. The fundus of low and moderate myopia is generally unchanged or leopard shaped fundus, myopic solitary spot, atrophy of temporal or peripheral annular choroid of optic nerve papilla, macular degeneration, bleeding Fuchs macula, posterior scleral staphyloma, and prone to retinal tears and retinal detachment;, 6. High myopia is slightly prominent due to the long axis of the eye, with deep anterior chamber and large pupil, and slightly slow light reversal;,
When the eyeball is adjusted and stationary, the equal light from 5 meters away passes through the refraction of the eye, and the focus just falls on the retina, which can form a clear image. The eye with this refractive state is called emmetropia. Its focus falls in front of the retina and can not accurately form a clear image on the retina, which is called axial myopia. It has a high adaptability to the scattered light from nearby targets. As long as the target moves to a certain distance, it can obtain clear vision. Therefore, myopia can be corrected by concave spherical lens.
clinical manifestations:
1 The far vision decreased and the near vision was normal;
2. Visual fatigue;
3. Exophoric exotropia or co rotational exotropia can occur. Most strabismus eyes are one with high myopia;
4. People with high myopia often have vitreous liquefaction and turbidity, complicated with cataract, and consciously feel the dark shadow fluttering in front of their eyes or vision loss;
5. The fundus of low and moderate myopia is generally unchanged or leopard shaped fundus, myopic solitary spot, atrophy of temporal or peripheral annular choroid of optic nerve papilla, macular degeneration, bleeding Fuchs’ macula, posterior scleral staphyloma, and prone to retinal tears and retinal detachment;
6. High myopia slightly protrudes due to the long axis of the eye, with deep anterior chamber and large pupil, and slightly dull light reversal;