A Phlebotomy device for taking blood samples. This blood collection device can be either self administered or administered by a health care professional. The device includes a stand and a complete disposable proboscis set. The stand facilitates the stable retention of the blood collection tube holder at an angle which ensures accurate and expedient filling of blood sample tubes and the reduction of forthing or aerating. This stand has an open bottom providing a means to apply a needle adapter to the blood collection tube holder, to apply a snout to the needle adapter and to route the snout through a snout holder. The top of the stand includes a refillable needle disposal pit preferably comprised of hypochlorite clay. The needle adapter, having a needle insertable into a blood collection tube and the snout are incorporated in the proboscis set. the proboscis set further includes a mosquito needle insertable into a patient's blood vessel, comprising a needle guard, plastic wings with stilt adhesive attached thereon, and a hub to accommodate the connection of the snout. The plastic wings are foldable and attachable to the arm of the patient and maintain the needle at an angle to ensure that the needle penetrates only the upper portion of the vein being punctured, and thus keeps it steadily in place.

Phlebotomy trays are used to carry blood-drawing equipment to the bedside.

A Phoropter (or phoroptor) is an instrument commonly used by optometrists and ophthalmologists during an eye examination to measure an individual's refractive error and determine his or her eyeglass prescription. Sometimes a retinoscope or an automated refractor is used to provide initial settings for the phoropter. Phoropters can also measure phorias (natural resting position of the eyes), accommodative amplitudes, accommodative leads/lags, accommodative posture, horizontal and vertical vergences. The major components of the phoropter are the JCC (Jackson Cross-Cylinder) used for astigmatism correction, Risley prisms to measure phorias and vergences, and the (+), (-), and cylinder lenses. Propters are made with either plus or minus cylinders.

Phosphorous is a mineral that makes up 1% of the total body weight. It is present in every cell of the body, but 85% of the body's phosphorus is found in the bones and teeth. The main function of phosphorus is in the formation of bones and teeth. It plays an important role in the body's utilization of carbohydrates and fats and in the synthesis of protein for the growth, maintenance, and repair of cells and tissues. It is also crucial for the production of ATP, a molecule the body uses to store energy.

Photocoagulator laser is a laser combined with an ophthalmoscope for directing bursts of coherent light through a human eye to burn selected points on a detached retina; subsequent healing of the burns causes scars that weld the retina back into position.

Photocoagulator system is a surgical instrument containing a laser for use in photocoagulation. It is ideal for guiding a semiconductor laser beam to an eye to be treated for a photocoagulation operation. It comprises a main device for incorporating first semiconductor laser light sources, an auxiliary device for incorporating second semiconductor laser light sources, an optical fiber for guiding to the auxiliary device output beams from the first semiconductor laser light sources incorporated in the main device.

Photocoagulator is a surgical instrument containing a laser for use in photocoagulation. It has a light source device and an ophthalmoscope device. The light source device and the ophthalmoscope device are optically connected to each other by optical fiber means adapted to transmit the light.

Photodynamic therapy (PDT) is a treatment that combines a light source and a photosensitizing agent to destroy cancer cells. It works because the photosensitizing agent collects more readily in cancer cells than in normal cells. When the agent is then exposed to light, it reacts with oxygen to create chemicals that can kill the cell. As the approved light sources can only penetrate a limited depth through tissue, PDT is mainly used to treat areas on or just under the skin, or in the lining of internal organs.

Photogrammetry System monitors the structural deformation of the large objects under sun- induced thermal stress in space conditions. Photogrammetry system is designed to reduce simulator-to-treatment and treatment-to-treatment patient. The photogrammetry system measures special targets made of a 0.1-mm thick (0.004 inch), flat, grayish colored retro-reflective material.