short notes ___ structure of human eye , myopia , hypermetropia
Answers
structure of human eye
ᴛʜᴇ ᴍᴀɪɴ ᴘᴀʀᴛs ᴏғ ᴛʜᴇ ʜᴜᴍᴀɴ ᴇʏᴇ ᴀʀᴇ ᴛʜᴇ ᴄᴏʀɴᴇᴀ, ɪʀɪs, ᴘᴜᴘɪʟ, ᴀǫᴜᴇᴏᴜs ʜᴜᴍᴏʀ, ʟᴇɴs, ᴠɪᴛʀᴇᴏᴜs ʜᴜᴍᴏʀ, ʀᴇᴛɪɴᴀ, ᴀɴᴅ ᴏᴘᴛɪᴄ ɴᴇʀᴠᴇ. ʟɪɢʜᴛ ᴇɴᴛᴇʀs ᴛʜᴇ ᴇʏᴇ ʙʏ ᴘᴀssɪɴɢ ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ᴛʀᴀɴsᴘᴀʀᴇɴᴛ ᴄᴏʀɴᴇᴀ ᴀɴᴅ ᴀǫᴜᴇᴏᴜs ʜᴜᴍᴏʀ. ᴛʜᴇ ɪʀɪs ᴄᴏɴᴛʀᴏʟs ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ᴘᴜᴘɪʟ, ᴡʜɪᴄʜ ɪs ᴛʜᴇ ᴏᴘᴇɴɪɴɢ ᴛʜᴀᴛ ᴀʟʟᴏᴡs ʟɪɢʜᴛ ᴛᴏ ᴇɴᴛᴇʀ ᴛʜᴇ ʟᴇɴs....
Myopia
ɪɴ ɴᴇᴀʀsɪɢʜᴛᴇᴅɴᴇss (ᴍʏᴏᴘɪᴀ), ᴛʜᴇ ᴘᴏɪɴᴛ ᴏғ ғᴏᴄᴜs ɪs ɪɴ ғʀᴏɴᴛ ᴏғ ᴛʜᴇ ʀᴇᴛɪɴᴀ, ᴍᴀᴋɪɴɢ ᴅɪsᴛᴀɴᴛ ᴏʙᴊᴇᴄᴛs ᴀᴘᴘᴇᴀʀ ʙʟᴜʀʀʏ. ɴᴇᴀʀsɪɢʜᴛᴇᴅɴᴇss (ᴍʏᴏᴘɪᴀ) ɪs ᴀ ᴄᴏᴍᴍᴏɴ ᴠɪsɪᴏɴ ᴄᴏɴᴅɪᴛɪᴏɴ ɪɴ ᴡʜɪᴄʜ ʏᴏᴜ ᴄᴀɴ sᴇᴇ ᴏʙᴊᴇᴄᴛs ɴᴇᴀʀ ᴛᴏ ʏᴏᴜ ᴄʟᴇᴀʀʟʏ, ʙᴜᴛ ᴏʙᴊᴇᴄᴛs ғᴀʀᴛʜᴇʀ ᴀᴡᴀʏ ᴀʀᴇ ʙʟᴜʀʀʏ....
Hypermetropia
ʜʏᴘᴇʀᴍᴇᴛʀᴏᴘɪᴀ, sᴏᴍᴇᴛɪᴍᴇs ᴄᴀʟʟᴇᴅ ʜʏᴘᴇʀᴏᴘɪᴀ, ɪs ᴛʜᴇ ᴛᴇʀᴍ ᴜsᴇᴅ ᴛᴏ ᴅᴇғɪɴᴇ ʙᴇɪɴɢ ʟᴏɴɢsɪɢʜᴛᴇᴅ. ɪғ ʏᴏᴜ ᴀʀᴇ ʜʏᴘᴇʀᴍᴇᴛʀᴏᴘɪᴄ, ᴛʜᴇ ɪᴍᴀɢᴇ ᴏғ ᴀ ɴᴇᴀʀʙʏ ᴏʙᴊᴇᴄᴛ ɪs ғᴏʀᴍᴇᴅ ʙᴇʜɪɴᴅ ᴛʜᴇ ʀᴇᴛɪɴᴀ. ᴛʜɪs ᴍᴇᴀɴs ᴛʜᴀᴛ ʟɪɢʜᴛ ɪs ғᴏᴄᴜsᴇᴅ ᴛᴏᴏ ғᴀʀ ʙᴀᴄᴋ ɪɴ ᴛʜᴇ ᴇʏᴇ, ᴄᴀᴜsɪɴɢ ᴛʜɪɴɢs ᴡʜɪᴄʜ ᴀʀᴇ ᴄʟᴏsᴇ ᴜᴘ ᴛᴏ ᴀᴘᴘᴇᴀʀ ʙʟᴜʀʀᴇᴅ.