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 Post subject: Re: Diseases
PostPosted: Mon Aug 01, 2011 8:38 pm 
Osän
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Even 20/0 isn't as good as you can get. There are only a certain number of rods and cones in the eye, so even an "infinitely close" scene will still be non-infinitely sharp. A creature with more cells in the eye would be able to see a scene that's even sharper.

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 Post subject: Re: Diseases
PostPosted: Mon Aug 01, 2011 9:20 pm 
Sumerul
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Soap wrote:
Even 20/0 isn't as good as you can get. There are only a certain number of rods and cones in the eye, so even an "infinitely close" scene will still be non-infinitely sharp. A creature with more cells in the eye would be able to see a scene that's even sharper.


Hence why it's not even on the scale, as 20/20-style measurements are intended for humans, rather than humans with magically enhanced eyes that see sharper than a human could possibly see.

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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 12:49 am 
Osän
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most excellent

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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 1:03 pm 
Smeric
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I don't deny it.

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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 1:10 pm 
Šriftom
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Ollock wrote:
Soap wrote:
Even 20/20 isn't as good as you can get. There are only a certain number of rods and cones in the eye, so even an "infinitely close" scene will still be non-infinitely sharp. A creature with more cells in the eye would be able to see a scene that's even sharper.


Hence why it's not even on the scale, as 20/20-style measurements are intended for humans, rather than humans with magically enhanced eyes that see sharper than a human could possibly see.


When I was a kid I had 20/15 vision.
Now it's 20/150.
20/20 is just average.


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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 1:29 pm 
Lebom
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Joined: Sun May 22, 2011 8:46 pm
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Damarora syndrome is transmissible between mothers and infants?

That's just profoundly cruel. .


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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 1:39 pm 
Šriftom
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vampyre_smiles wrote:
[20/5 means you would see at 20 ft what most would see at 5.
Substitute "read" for "see", and yes. 20/5 vision is (much) better than average.


vampyre_smiles wrote:
20/25 you would see at 25 what most would see at 20.

No, that's backwards. 20/25 means you read at 20 feet what most read at 25 feet. 20/25 is (slightly) worse than average.


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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 5:01 pm 
Smeric
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Ollock wrote:
I'm thinking maybe the level of visual acuity he's talking about is so damn good that it can't be measured using the normal scale. These guys can apparently resolve individual atoms or some such insanity.

Not individual atoms, but a great deal more than an average human could. Think of everything apparently smooth or monochromatic showing texture or blotchiness imperceptible to the ordinary eye, and being able to see the very fine details in textured surfaces, bringing us to the fact that:

Soap wrote:
A human brain would probably have difficulty coping with that amount of visual information, though.

Hence it being a disease, and the typical treatment being glasses which worsen your vision to the point of it not giving you a headache to look at anything.

I suppose it would be, physically, the result of a proliferation of cones and rods far beyond what is normal, though I have yet to decide whether they would even know what a cone or a rod is.

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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 5:26 pm 
Osän
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what? how do they reproduce,then ?
dabum-ch!

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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 9:22 pm 
Smeric
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I don't get it.

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 Post subject: Re: Diseases
PostPosted: Tue Aug 02, 2011 10:08 pm 
Sumerul
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Christopher Schröder wrote:
I don't get it.


You will someday.

As for the rod and cone thing, I say don't worry about it. Your world has magic. The disease is magical. Thus the visual acuity is due to something in your magic system. It doesn't have to have anything to do with rods or cones or anything. Maybe just a magicky field that enhances the eyes. Or ... you know ... maybe nobody really knows or cares for a physical explanation. It's just what it is.

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 Post subject: Re: Diseases
PostPosted: Sun Jun 18, 2017 3:34 pm 
Osän
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Fleas
Bloodsucking fleas are common in the moist areas of Pusapom where most humans also live. The most dangerous species, tiplabwae, is also the Poswa word for fleas in general. This flea inflicts a painful bite, usually to the calves or thighs, but can be quickly brushed off by a human. It is not the bite but the viral disease carried by many tiplabwae fleas that is responsible for human fatalities. This disease is called mumu sasa and is characterized by opportunistic infections similar to those found in HIV infection.

(Note: this is the same disease I mentioned on the first page, but I've changed the vector from flies to fleas. This means that the disease can be avoided by avoiding the other animals that the fleas prey on.)

Parasitic worms
Poswobs have more to fear from worms than germs. The plabas is a hookworm that lives in moist soil and can enter the human body after reaching exposed skin. It is most commonly encountered in gardens where the soil has been recently disturbed.

Inside the body, the plabas worm migrates to the small intestine and feeds on blood and undigested nutrients from the host's diet. The worm lays eggs which adhere to the walls of the intestine and hatch into larvae called bamblambum. Shortly after birth, the bamblambum bite through the intestine and begin eating their way through the tissues of the body, growing in size as they digest the tissues and organs of the host body. After this journey they break through the skin, usually on the legs or feet of the host, and exit the body to begin the free-living stage of their life cycle.

Here, the plabas worms seek out growing vegetables, particularly those that grow mostly or entirely underground. During this stage of their life they feed on the vegetables, and after molting, they crawl up to the surface in order to seek out a new human host to invade.


Triactinomyxons
The pwep is a triactinomyxon that lives in salt water and spends most of its lifecycle in the body of a bottom-dwelling predatory lamprey. Infected lampreys periodically expel tiny, free-floating pwep spores through their anus into the water. The pwep spores can infect humans who are swimming or walking in the water. The pwep has no sensory organs, and has no preferred host for this stage of their life cycle. Upon encountering exposed human skin, the pwep rapidly enters the body, causing extreme pain to the host. Once inside the body, the triactinomyxon reproduces asexually and the newly formed spores seek out muscle tissue on which to feed. The spores that grow inside the human are even smaller than the type that originally infected the human, but are capable of rapid growth. The spores feed on muscle tissue and expel their waste products into the human host's bloodstream.

The next step in the triactinomyxon's life stage occurs when the infected human host is bitten by a lamprey. For the parasite to infect the lamprey, the lamprey's bite must reach deep into muscle tissue containing the triactinomyxons' spores.
Transmission of the parasite is therefore most likely if a lamprey bites a human who has been weakened by the disease and is too weak to fend off the bite of the lamprey.

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