Myopia, also known as short sightedness, is a vision condition where parallel rays of light focus in front of the retina. There are several types of myopia including axial, curvatural, positional, index, and accommodation-induced myopia. Myopia can be congenital, developmental, pathological, or acquired. Common symptoms include poor distance vision and asthenopic symptoms like eye strain, while signs include prominent eyeballs, a deeper anterior chamber, and larger pupils.

1. Myopia
• Myopia is short sightedness.
•When the parallel rays coming from infinite to
focus in front of the retina.

2. Etiological classification
1. Axial myopia
2. Curvatural myopia
3. Positional myopia
4. Index myopia
5. myopia due to excessive accommodation

3. Clinical varities
1. Congenital myopia
2. Simple or development myopia
3. Pathological o degenerative myopia
4. Acquired myopia

4. Symtoms
1. Poor vision for distance
2. Asthenopic symptoms
3. Half shutting of eyes

5. Signs
1. Prominent eyeballs
2. Anterior chamber deeper than normal
3. Pupils larges
4. Funds normal