Health encyclopaedia - Alphabetical Topic List

| A | | B | | C | | D | | E | | F | | G | | H | | I | | J | | K | | L | | M |
| N | | O | | P | | Q | | R | | S | | T | | U | | V | | W | | X | | Y |

Causes of Long-sightedness

Long-sightedness can occasionally run in families, and it is therefore important that children under three are formally tested for the condition if there is a family history. Other than genetic factors, there are rarely definite causes for long-sightedness. Rarely, hypermetropia may be caused by conditions that indent and shorten the eyeball, such as orbital tumours behind the eye.